The Castle of Santa Florentina (Spanish: Castillo de Santa Florentina) is an 11th-century medieval castle in Canet de Mar, Catalonia, Spain. It was built on the foundations of an Ancient Roman villa by Guadimir de Canet (born 1024). In the 16th century, it passed into the hands of Dimas Muntaner. In 1908, it hosted King Alfonso XIII, who made the castle's owner count of Canet. In 1910, the castle was expanded and renovated by the modernist architect Lluís Domènech i Montaner, and its facade acquired some gargoyles by the sculptor . The magazine Architectural Digest covered the castle as among the "most beautiful houses in the world" in 1998 on account of its harmonious fusion of Gothic and Modernist designs.