Desmond Castle is a historic structure located in Kinsale, Ireland. Originally built in the 16th century, it served as a customs house and a fortified residence for the Earls of Desmond. The castle features a mix of architectural styles, reflecting its long history and various renovations. Today, Desmond Castle is a popular tourist attraction and houses the Kinsale Museum. Visitors can explore its well-preserved rooms and learn about the castle's role in trade and military history. The site offers insights into the life and times of Kinsale during the late medieval period.