The title "King of Sicily" refers to the monarch who ruled the island of Sicily, which is located in the Mediterranean Sea. The kingdom was established in the 11th century and became a significant political and cultural center in Europe. It was ruled by various dynasties, including the Normans, Hohenstaufen, and Aragonese. The Kingdom of Sicily played a crucial role in the Mediterranean trade and was known for its rich cultural heritage, blending influences from Arab, Byzantine, and Italian civilizations. The title was officially abolished in the 19th century when Sicily became part of the unified Kingdom of Italy.