Question: Information:  - The Lombard League (Italian and Lombard: ) was a medieval alliance formed in 1167, supported by the Pope, to counter the attempts by the Hohenstaufen Holy Roman Emperors to assert influence over the Kingdom of Italy as a part of the of the Holy Roman Empire. At its apex, it included most of the cities of Northern Italy, but its membership changed with time. With the death of the third and last Hohenstaufen emperor, Frederick II, in 1250, it became obsolete and was disbanded.  - King of Italy (Latin: "Rex Italiae"; Italian: "Re d'Italia") was the title given to the ruler of the Kingdom of Italy after the fall of the Western Roman Empire. The first to take the title was Odoacer, a "barbarian" military leader, in the late 5th century, followed by the Ostrogothic kings up to the mid-6th century. With the Frankish conquest of Italy in the 8th century, the Carolingians assumed the title, which was maintained by subsequent Holy Roman Emperors throughout the Middle Ages. The last Emperor to claim the title was Charles V in the 16th century. During this period, the holders of the title were crowned with the Iron Crown of Lombardy.  - Aachen or Bad Aachen, traditionally known in English and French as Aix-la-Chapelle , is a spa and border city in North Rhine-Westphalia, Germany. Aachen was the preferred residence of Charlemagne, and, from 936 to 1531, the place where 31 Holy Roman Emperors were crowned Kings of the Germans.  - The Holy Roman Emperor (historically "" "Emperor of the Romans") was the ruler of the Holy Roman Empire. From an autocracy in Carolingian times the title evolved into an elected monarchy chosen by the Prince-electors. Until the Reformation the Emperor elect ("imperator electus") was required to be crowned by the Pope before assuming the imperial title.  - Switzerland, officially the Swiss Confederation, is a federal republic in Europe. It consists of 26 cantons, and the city of Bern is the seat of the federal authorities.  The country is situated in Western-Central Europe, and is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland is a landlocked country geographically divided between the Alps, the Swiss Plateau and the Jura, spanning an area of . While the Alps occupy the greater part of the territory, the Swiss population of approximately eight million people is concentrated mostly on the plateau, where the largest cities are to be found: among them are the two global cities and economic centres Zürich and Geneva.  - San Marino, officially the Republic of San Marino, also known as the Most Serene Republic of San Marino, is an enclaved microstate surrounded by Italy, situated on the Italian Peninsula on the northeastern side of the Apennine Mountains. Its size is just over , with a population of 33,562. Its capital is the City of San Marino and its largest city is Dogana. San Marino has the smallest population of all the members of the Council of Europe.  - Italy, officially the Italian Republic, is a unitary parliamentary republic in Europe. Located in the heart of the Mediterranean Sea, Italy shares open land borders with France, Switzerland, Austria, Slovenia, San Marino and Vatican City. Italy covers an area of and has a largely temperate seasonal climate and Mediterranean climate; due to its shape, it is often referred to in Italy as "lo Stivale" (the Boot). With 61 million inhabitants, it is the fourth most populous EU member state.  - The Kingdom of Sicily (, , ) was a state that existed in the south of the Apennine peninsula from its founding by Roger II in 1130 until 1816. It was a successor state of the County of Sicily, which had been founded in 1071 during the Norman conquest of the southern peninsula. Until 1282 the Kingdom (sometimes called the "regnum Apuliae et Siciliae", ""Kingdom of Apulia and Sicily"") covered not only the island of Sicily, but also the whole Mezzogiorno region of the southern Apennines and the Maltese archipelago. The island was divided into three regions: Val di Mazara, Val Demone and Val di Noto; 'val' being the Arabic word meaning 'district'.  - The euro (sign: €; code: EUR) is the official currency of the eurozone, which consists of 19 of the member states of the European Union: Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain. The currency is also officially used by the institutions of the European Union and four other European countries, as well as unilaterally by two others, and is consequently used daily by some 337 million Europeans . Outside of Europe, a number of overseas territories of EU members also use the euro as their currency.  - The Hohenstaufen, also called the Staufer or Staufen, were a dynasty of German kings (11381254) during the Middle Ages. Besides Germany, they also ruled the Kingdom of Sicily (11941268). In Italian historiography, they are known as the "Svevi" (Swabians), since they were (successive) dukes of Swabia from 1079. Three members of the dynastyFrederick I, Henry VI and Frederick IIwere crowned Holy Roman Emperor.  - Northern Italy is a cultural and geographical region, without any administrative purpose, used to indicate the northern part of the Italian state, also informally referred as "Il Nord", "Settentrione" or "Alta Italia". It consists of 8 regions in northern Italy: Aosta Valley, Piedmont, Liguria, Lombardy, Emilia-Romagna, Veneto, Friuli-Venezia Giulia, Trentino-Alto Adige/Südtirol. According to the 2011 census, its population was 27,213,372. For statistic purposes, the Istituto Nazionale di Statistica (ISTAT) uses the term Northwest Italy and Northeast Italy for identifying two of the five statistical regions in its reporting. These same subdivisions are used to demarcate first level Nomenclature of Territorial Units for Statistics (NUTS) regions ("NUTS 1 regions") within the European Union, and the Italian constituencies for the European Parliament.  - Apulia ( Apoulia) is a region of Italy in Southern Italy bordering the Adriatic Sea in the east, the Ionian Sea to the southeast, and the Strait of Òtranto and Gulf of Taranto in the south. Its southernmost portion, known as the Salento peninsula, forms a "stiletto" on the "boot" of Italy. The region comprises , and its population is about 4 million.  - The pope (from "pappas", a child's word for "father") is the Bishop of Rome and, therefore, the leader of the worldwide Catholic Church. The primacy of the Roman bishop is largely derived from his role as the traditional successor to Saint Peter, to whom Jesus is supposed to have given the keys of Heaven and the powers of "binding and loosing", naming him as the "rock" upon which the church would be built. The current pope is Francis, who was elected on 13 March 2013, succeeding Benedict XVI.  - Frankfurt am Main is a metropolis and the largest city in the German state of Hesse and the fifth-largest city in Germany, with a 2015 population of 731,095 within its administrative boundaries, and 2.3 million in its urban area. The city is at the centre of the larger Frankfurt Rhine-Main Metropolitan Region, which has a population of 5.8 million and is Germany's second-largest metropolitan region after Rhine-Ruhr. Since the enlargement of the European Union in 2013, the geographic centre of the EU is about to the east of Frankfurt's CBD, the Bankenviertel. Frankfurt is culturally and ethnically diverse, with around half of the population, and a majority of young people, having a migration background. A quarter of the population are foreign nationals, including many expatriates.  - Sicily is the largest island in the Mediterranean Sea. It constitutes an autonomous Region of Italy, along with surrounding minor islands, officially referred to as "Regione Siciliana" (in Italian, Sicilian Region).  - A mediterranean climate or dry summer climate is the climate typical of the lands in the Mediterranean Basin. The lands around the Mediterranean Sea form the largest area where this climate type is found, but it also is found in most of coastal California, in parts of Western and South Australia, in southwestern South Africa, sections of Central Asia, and in central Chile.  - France, officially the French Republic, is a country with territory in western Europe and several overseas regions and territories. The European, or metropolitan, area of France extends from the Mediterranean Sea to the English Channel and the North Sea, and from the Rhine to the Atlantic Ocean. Overseas France include French Guiana on the South American continent and several island territories in the Atlantic, Pacific and Indian oceans. France spans and had a total population of almost 67 million people as of January 2017. It is a unitary semi-presidential republic with the capital in Paris, the country's largest city and main cultural and commercial centre. Other major urban centres include Marseille, Lyon, Lille, Nice, Toulouse and Bordeaux.  - Slovenia, officially the Republic of Slovenia (Slovene: , abbr.: "RS"), is a nation state in southern Central Europe, located at the crossroads of main European cultural and trade routes. It is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and the Adriatic Sea to the southwest. It covers and has a population of 2.06 million. It is a parliamentary republic and a member of the United Nations, European Union, and NATO. The capital and largest city is Ljubljana.  - The Mediterranean Sea (pronounced ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Southern Europe and Anatolia, on the south by North Africa, and on the east by the Levant. The sea is sometimes considered a part of the Atlantic Ocean, although it is usually identified as a separate body of water.  - Frederick I (1122  10 June 1190), also known as Frederick Barbarossa, was the Holy Roman Emperor from 1155 until his death. He was elected King of Germany at Frankfurt on 4 March 1152 and crowned in Aachen on 9 March 1152. He became King of Italy in 1155 and was crowned Roman Emperor by Pope Adrian IV on 18 June 1155. Two years later, the term ' ("holy") first appeared in a document in connection with his Empire. He was later formally crowned King of Burgundy, at Arles on 30 June 1178. He was named ' by the northern Italian cities which he attempted to rule: Barbarossa means "red beard" in Italian; in German, he was known as ", which has the same meaning.  - The County of Sicily was a Norman state comprising the islands of Sicily and Malta from 1071 until 1130. The county began to form during the Christian reconquest of Sicily (106191) from the Muslim Emirate, established by conquest in 965. The county is thus a transitional period in the history of Sicily. After the Muslims had been defeated and either forced out or incorporated into the Norman military, a further period of transition took place for the county and the Sicilians.  - Vatican City , officially Vatican City State or the State of Vatican City, is a walled enclave within the city of Rome. With an area of approximately 44 hectares (110 acres), and a population of 842, it is the smallest State in the world by both area and population, but formally it is not sovereign, sovereignty being held by the Holy See, the only entity of public international law that has diplomatic relations with almost every country in the world.  - Arles (Provençal in both classical and Mistralian norms; "Arelate" in ancient Latin) is a city and commune in the south of France, in the Bouches-du-Rhône department, of which it is a subprefecture, in the former province of Provence.  - The Treaty or Peace of Venice , 1177 , was a peace treaty between the papacy and its allies , the north Italian city - states of the Lombard League , and Frederick I , Holy Roman Emperor . The Norman Kingdom of Sicily also took part in negotiations and the treaty thereby determined the political course of all Italy for the next several years . The treaty followed on the heels of the Battle of Legnano of 29 May 1176 , a defeat for Frederick Barbarossa . Frederick quickly thereafter sent envoys to Pope Alexander III at Anagni , asking for an end to the schism between him and Frederick 's antipope , Callixtus III. After a preliminary agreement was reached , a conference was scheduled for July 1177 . Frederick spent some time in the interim interfering in Venetian rivalries in hopes of securing a pro-Imperial group in power at the time of the confrontation . On 24 July , the pope from the Basilica di San Marco sent a delegation of cardinals to the emperor in the Lido , at the mouth of the Venetian Lagoon . The emperor formally acknowledged Alexander as pope and abandoned his own antipope ; the cardinals formally lifted the excommunication that had hitherto been placed upon him . Sebastian Ziani , the doge of Venice , and Ulrich II von Treven , the patriarch of Aquileia , then escorted the emperor into Venice itself . The delegates of the king of Sicily were Romuald , Archbishop of Salerno , a chronicler of his time who left us a great eyewitness account of the whole scene , and Count Roger of Andria . In the treaty that was concluded , the emperor recognised the temporal rights of the popes over the city of Rome , but the city did not surrender to the pope and forced him to leave in 1179 . A fifteen - year peace was concluded between Frederick and William II of Sicily , paving the way for Sicily 's golden years of peace and prosperity . Likewise , a six - year truce was concluded with the Lombard League , but negotiations were to continue , and the emperor finally recognised the independence of the Lombard cities...  - The Holy Roman Empire was a multi-ethnic complex of territories in central Europe that developed during the Early Middle Ages and continued until its dissolution in 1806. The largest territory of the empire after 962 was the Kingdom of Germany, though it also came to include the Kingdom of Bohemia, the Kingdom of Burgundy, the Kingdom of Italy, and numerous other territories.    What entity does 'treaty of venice' has the relation 'country' with?
Answer:
vatican city