This side chapel in the Cathedral of Santo Domingo is also the tomb of Alessandro Geraldini, Santo Domingo, Dominican Republic. The Capilla del Cristo de la Agonia. The Cathedral of Santa Maria La Menor was the first cathedral built in the Americas, completed about 1540 A.D. It is a Minor Basilica and is located in the old Colonial City of Santo Domingo. UNESCO World Heritage Site of the Colonial City of Santo Domingo. Fray Geraldini was the first resident bishop of Santo Domingo who died in 1524.