The square that surrounds and is named for the Catedral de la Habana is one of La Habana Vieja's most beautiful spots. In addition to the cathedral, you'll find several elegant mansions that once housed the city's aristocrats.
The Casa de los Marqueses de Aguas Claras (1751–75), in the square's northwestern corner, was built by Antonio Ponce de León, the first Marquis of Aguas Claras and a descendent of the discoverer of Florida, Juan de Ponce de León. Today the building contains the Restaurant Paris, a stylish eatery whose tables fill a verdant interior courtyard as well as the upper floors. On the square's western edge is the 19th-century Casa de Baños (Bath House), which was built on the spot where an aljibe (cistern) was constructed in 1587. It served as the main municipal water supply and as a public bathing house. The narrow cul-de-sac next to the Casa de Baños is the Callejón del Chorro (Alley of the Water Fountain), named for an aqueduct that ended here in Havana's early days.
Wander along the square's eastern edge for a look at the early 18th-century Casa de Lombillo, which today houses a number of changing art exhibitions.