The deanery church is devoted to St. Bertinus, the abbot of the St. Omer abbey and former liege of Poperinge. The portal is decorated with a statue of St. Bertinus and obituary notices are on display: this custom is still in use in Torhout and Bruges. Especially the ingenious baroque wood carving shows competent chisel skills: the rood loft with Christ and his 12 disciples, the monumental pulpit and the confessional. There is also a certain "couleur locale": hops on the rood loft, hop picking scenes in the modern glass-stained windows. The Paccar carillon was played in, in 1981 and is famous for the purity of its sound.