Old Havana, located around the five main squares, and has one of the most impressive ensembles of historical architecture. From Baroque to Art Deco, from Neoclassicism to Art Nouveau, the rainbow-colored facades of the area adorn the diverse cultural heritage of Cuba.
Founded in the early 16th century on the southwest coast of Cuba by Spanish conquistador Pánfilo de Narváez, Havana moved twice before taking permanent establishment on the Caribbean island’s northwest coast.
Strategically chosen for its location in the Gulf of Mexico, Havana became a mandatory stop for ships traveling to and from the New World, and quickly became the largest port in the Spanish West Indies. Today, the city still claims some of the oldest stone fortifications in the Americas, and Old Havana, or Habana Vieja, claims some of the most beautiful architecture.
https://www.nationalgeographic.com/travel/destinations/north-america/cuba/havana/old-havana-world-heritage-site/