Information:  - Coburg is a town located on the Itz river in the Upper Franconia region of Bavaria, Germany. Long part of one of the Thuringian states of the Wettin line, it joined Bavaria by popular vote only in 1920. Until the revolution of 1918, it was one of the capitals of the Duchy of Saxe-Coburg and Gotha and the Duchy of Saxe-Coburg-Saalfeld. Through successful dynastic policies, the ruling princely family married into several of the royal families of Europe, most notably in the person of Prince Albert, who married Queen Victoria in 1840. As a result of these close links with the royal houses of Europe in the late 19th and early 20th centuries, Coburg was frequently visited by the crowned heads of Europe and their families.  - Franconia (also called "Frankenland") is a region in Germany, characterised by its culture and language, and may be roughly associated with the areas in which the East Franconian dialect group, locally referred to as "fränkisch", is spoken. It commonly refers to the eastern part of the historical Franconian stem duchy, mainly represented by the modern Bavarian administrative districts of Lower, Middle, and Upper Franconia, the adjacent northeastern parts of Heilbronn-Franken in Baden-Württemberg, parts of Thuringia south of the Rennsteig ridge, and small parts of Hesse. However, there is no fixed area that is officially defined as Franconia.  - Saalfeld is a town in Germany, capital of the Saalfeld-Rudolstadt district of Thuringia. It is best known internationally as the ancestral seat of the Saxe-Coburg and Gotha branch of the Saxon House of Wettin, which was renamed the House of Windsor during their British reign in 1917.  - Princess Victoria of Saxe - Coburg - Saalfeld ( Marie Luise Victoire ; 17 August 1786 -- 16 March 1861 ) was a German princess and the mother of Queen Victoria of the United Kingdom .    What entity does 'princess victoria of saxe-coburg-saalfeld' has the relation 'noble family' with?
The answer to this question is:
house of wettin