Maudlin Castle is a tower house which formed part of a medieval hospital and National Monument located in Kilkenny, Ireland.

[citation needed] The Hospital of St. Mary Magdalene in Kilkenny was opened sometime before 1327 (perhaps by William Marshal, 1st Earl of Pembroke in the early 13th century) and it quickly became one of the main leper houses in medieval Ireland.

[citation needed] The surviving tower house was built in the early 16th century.

[5] The hospital also served as a "retirement home" for rich families like the Rothes, Langtons and Shees.

[citation needed] The tower is 25 m (82 ft) and four storeys high, with a stair turret continuing up to the battlements.