The Gallipoli Cathedral, formally the Co-Cathedral Basilica of Saint Agatha the Virgin, was built in 1629-1696. The church is a minor basilica and the co-cathedral of the Diocese of Nardò-Gallipoli.
The Baroque facade of the cathedral was designed by Giuseppe Zimbalo, Francesco Bischetini, and Scipione Lachibari. It is constructed out of carparo stone, sourced from Southern Italy. The church was built with a cruciform floorpan in the shape of a Latin cross.
The interior of the church is a mixture of the Byzantine and Renaissance styles. The nave is flanked by columns of grey marble, which support an arcade. The interior is ornamented by paintings by Giovanni Andrea Coppola, a painter native to Gallipoli. Nicolò Malinconico painted the frescoes on the walls and in the cupola, which depicts the martyrdom of Saint Agatha.
The cathedral's altar is made of a reused Ancient Roman marble stele. There is an Ancient Greek inscription on the stele.
References:The first written record of church in Danmark locality date back to the year 1291. Close to the church are several stones with a Christian text and cross inscribed. The oldest parts of the present red-brick church are from the 1300s. In the late 1400s the church was enlarged to the appearance it has today. The church has been modified both internally and externally several times, among other things after the fires in 1699 and 1889. There are lot of well-preserved mural paintings in the walls.