The Cannon Blast ceremony (El Cañonazo de las Nueve) is one of the oldest and attractive traditions of Havana. In colonial days, the shots signalled the closing of the gates of the walled city and the rising of the chain across the entrance to the harbour. The tradition of firing a cannon every night at 9:00 pm was kept even after the wall was torn down and is still used for checking your watch.

This square dates back to the first half of the 17th century. Its location, just a few metres from the bay, led to it becoming an important trading square over the years. It is said that around the year 1600 the first fountain of the city could be seen at this square. In 1836 it was replaced by a beautiful fountain made of white Carrara marble by Giuseppe Gaggini, under the good auspices of the Villanueva Count. This fountain is called Fuente de los Leones (Lions Fountain). On its paved area stand two noteworthy buildings: the Monastery and Basilica of San Francisco de Asís, which today houses the Museum of Religious Art and a concert hall. It is also where the Lonja del Comercio (Chamber of Commerce) is located, inspired by Spanish Renaissance architecture and topped by a dome on which a sculpture of the god Mercury stands. Among the houses built around the plaza, the house of the Arostegui family, residence of the Captain Generals until the completion of the City Hall at the end of the 18th century, was erected.

The San Francisco de Asís Church and Convent is the current scenario of the richest cultural traditions. This is one of the most extraordinary convent and church complex of the colonial time. The construction of the current set dates from 1738, and it replaced a more modest one completed in 1591. After a restoration in the nineties, the architectural group has harbored, also, a concert hall and the Holy, Sacred and Religious Art museums. The most significant element of the Church is the Tower 42 meters of height, second in altitude at the colonial time. 

This is a 1760 Baroque palace venerated for the great beauty of its Andalusian patio. It has a fountain surrounded by tropical vegetation where you will find several tortoises. Before the Revolution, this monumental building was the headquarters of the Industrial Bank; nowadays it houses the El Patio Restaurant. Although it offers traditional Cuban food, it speciality is meat and crustaceous, dishes as the Cathedral Mixed Grill (a varied grill) and skewers of lobsters and shrimps. The bar serves a collection of wines beers, rums and cocktails. It is currently possible to buy souvenirs in the craftworks shop located in the former Casa de Baños House, on the western side of the Cathedral square.