The oldest parts of the Ekeby Church date back to the 12th century, with subsequent expansions over the years. In the mid-17th century, the church's eastern gable was restored and a brick chancel was added, becoming a burial chapel for the Ribbing family. The church tower was added between 1752 and 1754 at the request of Pastor Curman, replacing the old bell tower. The central stone pillars and vault were removed in 1786, replaced by a wooden vault. In 1846, a new oak cross was added to the church tower, gilded with gold by mirror manufacturer Stenberg in Vadstena, based on drawings possibly by architect Carl Hårleman.
The pulpit, made of oak, pine, and hardwood, was crafted in the 17th century and donated in 1675 by Erik Ribbing and Beata Rosenhane. The triumphant crucifix is likely from the 14th century. Madonna sculpture in carved and painted wood, was probably from a local workshop in the 15th century. Sandstone baptismal font dates from the 12th century, featuring carved figures of two bishops, a layman with a lily, and a woman with an apple.
Altarpiece depicting Christ on the cross surrounded by Virgin Mary, Mary Magdalene, and John, painted in 1693 by David Klöcker Ehrenstrahl and donated by Catharina Ribbing in 1697.
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.