St John the Baptist Church was probably built in the 1180s as the first rector was installed in 1189. It was refurbished by Jasper Tudor, Duke of Bedford in 1485–95 and again in 1825–27 by the rector Rev. Robert Knight who added the vestry and altered the stone pulpit. The building was restored by John Prichard and John Pollard Seddon in 1860–61 and an organ chamber was added in 1885. More restoration work in 1903 and 1927 included reflooring the nave, reroofing the porch and installing oak stalls in the chancel. A meeting room and vestry wing were added in 1993.
The plan of the building is a tower in the west, nave, south porch, chancel, north-eastern chapel and northern wing. The church is built of roughly coursed grey rubble with grey or yellow ashlar dressings and has a slate roof with stone apex finials. The large and defensive west tower has wide-angle buttresses at each corner and a saddleback roof with embattled and corbelled parapets only on the northern and southern sides. The stone-tiled coping is topped by a weathervane. The northern and southern faces of the tower have four storeys of small round or square openings, although one on the south face is trefoil headed. The eastern facade has large shouldered openings above a corbel table that probably supported a wooden platform. The western side of the tower has a face corbel, reputedly of Saint John the Baptist, above a louvred gable opening, a clock and a three-light window above the ornate western doorway.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.