The Ponce Historic Zone covers the grid of streets surrounding Plaza las Delicias and preserves one of the finest ensembles of late colonial architecture in the Caribbean. The buildings date mainly from the 1850s to the early twentieth century, when Ponce was the wealthiest city in Puerto Rico and its merchants and landowners were building to demonstrate that wealth. Many have been restored to their original colours — dusty pinks, yellows, pale greens, and blues — and the overall effect is of a city that has recovered its self-confidence after decades of neglect.
The best way to explore the zone is on foot, wandering the streets immediately surrounding the plaza. Calle Mayor and Calle Luna are the main commercial streets; the residential blocks to the north and west contain the most elaborate mansions. The Residencia Armstrong-Poventud, across from the cathedral, is among the finest single buildings in the zone. The district is listed on the US National Register of Historic Places and is actively protected, which has slowed the demolition and replacement that has damaged other Puerto Rican historic centres.