"Castellania" can refer to several different concepts or locations. One notable example is a historical term used in medieval Europe, particularly in the context of feudal governance, where it denoted a district or area governed by a castellan, who was responsible for the administration and defense of a castle and its surrounding lands. Additionally, "Castellania" may refer to specific places, such as a locality in Malta known for its historical significance. It can also relate to various organizations or institutions that bear the name, each with its unique context and relevance in different fields or regions.