Please answer the following question: Information:  - In the history of Europe, the Middle Ages or medieval period lasted from the 5th to the 15th century. It began with the fall of the Western Roman Empire and merged into the Renaissance and the Age of Discovery. The Middle Ages is the middle period of the three traditional divisions of Western history: classical antiquity, the medieval period, and the modern period. The medieval period is itself subdivided into the Early, High, and Late Middle Ages.  - iovo (pronounced ) is a small island located off the Adriatic coast in Croatia with an area of (length , width up to ), population of 5,908 inhabitants (2011) and its highest peak is 218 m (Rudine).  - The Adriatic Sea is a body of water separating the Italian Peninsula from the Balkan peninsula and the Apennine Mountains from the Dinaric Alps and adjacent ranges. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Sea) to the northwest and the Po Valley. The countries with coasts on the Adriatic are Albania, Bosnia and Herzegovina, Croatia, Greece, Italy, Montenegro and Slovenia. The Adriatic contains over 1,300 islands, mostly located along its eastern, Croatian, coast. It is divided into three basins, the northern being the shallowest and the southern being the deepest, with a maximum depth of . The Otranto Sill, an underwater ridge, is located at the border between the Adriatic and Ionian Seas. The prevailing currents flow counterclockwise from the Strait of Otranto, along the eastern coast and back to the strait along the western (Italian) coast. Tidal movements in the Adriatic are slight, although larger amplitudes are known to occur occasionally. The Adriatic's salinity is lower than the Mediterranean's because the Adriatic collects a third of the fresh water flowing into the Mediterranean, acting as a dilution basin. The surface water temperatures generally range from in summer to in winter, significantly moderating the Adriatic Basin's climate.  - Trogir (Ancient Greek: , "Tragyrion" or , "Tragourion" "Trogkir") is a historic town and harbour on the Adriatic coast in Split-Dalmatia County, Croatia, with a population of 10,818 (2011) and a total municipality population of 13,260 (2011). The historic city of Trogir is situated on a small island between the Croatian mainland and the island of iovo. It lies west of the city of Split.  - A sovereign state is, in international law, a nonphysical juridical entity that is represented by one centralised government that has sovereignty over a geographic area. International law defines sovereign states as having a permanent population, defined territory, one government, and the capacity to enter into relations with other sovereign states. It is also normally understood that a sovereign state is neither dependent on nor subjected to any other power or state.  - A castle (from ) is a type of fortified structure built in Europe and the Middle East during the Middle Ages by nobility. Scholars debate the scope of the word "castle", but usually consider it to be the private fortified residence of a lord or noble. This is distinct from a palace, which is not fortified; from a fortress, which was not always a residence for nobility; and from a fortified settlement, which was a public defence  though there are many similarities among these types of construction. Usage of the term has varied over time and has been applied to structures as diverse as hill forts and country houses. Over the approximately 900 years that castles were built, they took on a great many forms with many different features, although some, such as curtain walls and arrowslits, were commonplace.  - Kamerlengo ( Gradina Kamerlengo ) is a castle and fortress in Trogir , Croatia . It was built by the Republic of Venice The castle was built in the mid- 15th century by Marin Radoj as part of an expansion of the Veriga Tower , built on the site in the late 14th century . It is used as a location for performances during the summer months . The word kamerlengo ( Italian : camerlengo ) refers to the title of a Venetian administrative official ( a chamberlain ) .  - 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 Middle East is a transcontinental region centered on Western Asia and Egypt. The corresponding adjective is "Middle-Eastern" and the derived noun is "Middle-Easterner". The term has come into wider usage as a replacement of the term Near East (as opposed to Far East) beginning in the early 20th century.  - Venice (; ) is a city in northeastern Italy and the capital of the Veneto region. It is situated across a group of 117 small islands that are separated by canals and linked by bridges. These are located in the shallow Venetian Lagoon, an enclosed bay that lies between the mouths of the Po and the Piave Rivers. Parts of Venice are renowned for the beauty of their settings, their architecture, and artwork. The lagoon and a part of the city are listed as a World Heritage Site.  - Croats are a nation and South Slavic ethnic group at the crossroads of Central Europe, Southeast Europe, and the Mediterranean Sea. Croats mainly live in Croatia and Bosnia and Herzegovina, but are an officially recognized minority in Austria, Czech Republic, Hungary, Italy, Montenegro, Romania, Serbia, and Slovakia. Responding to political, social and economic pressure, many Croats have migrated throughout Europe (especially Germany, Austria, Switzerland, France and Italy) and the Americas (particularly the United States, Canada, Argentina, and Chile), establishing a diaspora.  - A palace is a grand residence, especially a royal residence, or the home of a head of state or some other high-ranking dignitary, such as a bishop or archbishop.  - The Republic of Venice, or traditionally known as the Most Serene Republic of Venice, was a state originating from the lagoon communities in the area of Venice, now northeastern Italy. It existed from the late seventh century AD until 1797. Although it had a long history of war and conquest, the republic's modern reputation is chiefly based on its status as an economic and trading power.  - An arrowslit (often also referred to as an arrow loop, loophole or loop hole, and sometimes a balistraria) is a thin vertical aperture in a fortification through which an archer can launch arrows.  - Europe is a continent that comprises the westernmost part of Eurasia. Europe is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, and the Mediterranean Sea to the south. To the east and southeast, Europe is generally considered as separated from Asia by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways of the Turkish Straits. Yet the non-oceanic borders of Europea concept dating back to classical antiquityare arbitrary. The primarily physiographic term "continent" as applied to Europe also incorporates cultural and political elements whose discontinuities are not always reflected by the continent's current overland boundaries.  - Croatia, officially the Republic of Croatia, is a sovereign state between Central Europe, Southeast Europe, and the Mediterranean. Its capital city is Zagreb, which forms one of the country's primary subdivisions, along with its twenty counties. Croatia covers and has diverse, mostly continental and Mediterranean climates. Croatia's Adriatic Sea coast contains more than a thousand islands. The country's population is 4.28 million, most of whom are Croats, with the most common religious denomination being Roman Catholicism.  - 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.  - Split-Dalmatia County is the central-southern Dalmatian county in Croatia. The administrative center is Split. The population of the county is 455,242 (2011). The land area is 4540 km.  - Most Serene Republic ("Serenissima Respublica" in Latin) is a title attached to a number of European states through history. By custom, the appellation "Most Serene" is an indicator of sovereignty (see also Serene Highness or Most Serene Highness for a sovereign prince); consequently "Most Serene Republic" emphasizes the sovereignty of the republic.  - "Country House" is a song by English alternative rock band Blur. It was released as the lead single from the band's fourth album "The Great Escape" on 14 August 1995. "Country House" was the first of two Blur singles to reach number one on the UK Singles Chart (the second being 1997's "Beetlebum").  - Zagreb is the capital and the largest city of Croatia. It is located in the northwest of the country, along the Sava river, at the southern slopes of the Medvednica mountain. Zagreb lies at an elevation of approximately above sea level. In the last official census of 2011 the population of the City of Zagreb was 792,875. The wider Zagreb metropolitan area includes the City of Zagreb and the separate Zagreb County bringing the total metropolitan area population up to 1,237,887. It is the biggest metropolitan area in Croatia, and the only one with a population of over one million.    What is the relationship between 'kamerlengo castle' and 'historic city of trogir'?
A:
part of