Old Havana was also protected by a defensive wall begun in 1674 but had already overgrown its boundaries when it was completed in 1767, becoming the new neighborhood of Centro Habana. The influence from different styles and cultures can be seen in Havana's colonial architecture, with a diverse range of Moorish architecture, Spanish, Italian, Greek and Roman. The San Carlos and San Ambrosio Seminary (18th century) is a good example of early Spanish influenced architecture. The Havana cathedral (1748–1777) dominating the Plaza de la Catedral (1749) is the best example of Cuban Baroque. Surrounding it are the former palaces of the Count de Casa-Bayona (1720–1746) Marquis de Arcos (1746) and the Marquis de Aguas Claras (1751–1775).