Baclayon, being the earliest Spanish mission founded in Bohol in 1596, is home to Nuestra Señora Immaculada Concepcion Church, the oldest religious structure in the province, and one of the oldest existing stone churches in the entire country.

Established in 1717 and declared both as a National Historical Landmark in 1994 and a National Cultural Treasure in 2010, this beautiful coral stone church is located just a short distance from the seaside, like most early Spanish missions that were set up along the coasts of Bohol.

A new facade and a number of stone buildings that now surround the church were added in the 19th century.

Next to the church is an interesting old convent, which also houses a small museum with a fascinating collection of centuries-old religious images made of ivory, and ecclesistical relics such as vestments and other artifacts.

Also noteworthy are the big hymnals inscribed in Latin with ink taken from plant sap, the covers and pages of which are made of animal skin.

On October 15, 2013, a powerful earthquake caused significant damage to the church, resulting in the collapse of its portico and bell tower. The Diocese of Tagbilaran, in collaboration with government agencies focused on cultural preservation, diligently worked to restore the building, and it was officially reopened to the public on February 27, 2018.