The St. John the Baptist Church, also known as the Church of the Crusaders, is a historic church located in the ancient coastal city of Byblos, in Lebanon. It is believed to have been built during the 12th century by the Crusaders as part of the defense system for the city.

The church is characterized by its well-preserved architectural style, featuring two aisles and a nave, with a central apse and several lateral chapels. The church's façade is decorated with sculpted figures and stone reliefs depicting various religious scenes, while the interior features intricate stone carvings and frescoes.

The church has undergone several renovations and restorations over the centuries, with the most recent being in the mid-20th century. Today, it serves as a popular tourist attraction and a testament to the rich history and cultural heritage of Byblos.