At the edge of the city of Trikala a lead (kursum means lead in Turkish) dome covers the only mosque built in Greece by the renowned 16th century architect, Sinan. Story has it that it was founded by Osman Shah, son of Mustafa Pasha, who offered it to the city he was in charge of, after being healed of a sickness that put him through great hardship. A UNESCO protected monument, it used to be surrounded by other institutions, such as a house for the poor, a school, a guesthouse, etc.