The Castle Quarter is the part of Buda in Budapest, the capital city of Hungary, that lies within the defensive walls of the Buda Castle complex, corresponding to the medieval royal city of Buda. Located on Várhegy, it is the oldest part of Budapest, having been continuously inhabited since 1247. The center of the neighborhood are the streets between the Royal Palace and Matthias Church.
Sources
Text: introduction of the Wikipedia article Castle Quarter (Budapest), under the CC BY-SA 4.0 licence (authors: article history). Facts: Wikidata (CC0). Coordinates: Wikidata, map background © OpenStreetMap contributors.