The Castle of Tomar, also known as the Convent of Christ, is a historic fortress located in the town of Tomar, Portugal. Built in the 12th century, it served as the headquarters for the Knights Templar in Portugal. The castle features impressive architecture, including a round church and fortified walls, reflecting the military and religious significance of the Templars. The castle is part of a larger complex that includes the Convent of Christ, a UNESCO World Heritage site. Visitors can explore its various structures, which showcase different architectural styles, from Romanesque to Manueline. The site offers insights into Portugal's medieval history and the role of the Templars.