Tillitse Church was built in the first half of the 13th century and extended towards the west in the early 17th century. Little is known of its ownership in the Middle Ages but the Crown had clerical appointment rights at the time of the Reformation. In 1648, it was transferred to the ownership of the Rudbjerggård Estate where over the years it was governed by F.B. Bülow and Gustav Smith. It came into the ownership of Gustav Smith c. 1850 and was transferred to the Friderichsen family in 1850. In c. 1880, it was taken over by Landsmandsbanken which transferred it to the local congragation in 1907.
The church consists of a Romanesuqe apse, chancel and nave. It was extended towards the west in 1625 with a porch on the west gable in 1856. An arched frieze decorates the upper apse, topped by a saw-toothed cornice. Its three finely finished Romanesque windows have now been bricked up. The profile of the chancel's former south door can still be seen. There is a saw-tooth decoration along the top of the chancel with a more recent cornice. The remains of the nave's south portal extend up to the roof. The old Romanesque windows have been replaced by modern pointed-arch windows. There are lesenes on the east corner but those on the west corner have been removed. There is also an arched decorated topped by a saw-toothed line along the top of the nave.
The carved altarpiece from 1642 is the work of Jørgen Ringnis. It bears the arms of Joachim von Barnewitz, Øllegaard Pentz and Hartwig Passow. The Renaissance pulpit from 1608 presents the arms of Knud Rud and Ellen Marsvin. The church also contains a sandstone epitaph for Joachim von Barnewitz (died 1626) and Øllegaard Pentz (died 1654). There is a Romanesque font.
There is a free-standing runestone listed as DR 212 in the Rundata catalog that is outside the church porch. It was originally found in the churchyard wall in c. 1627 and was later used as a foundation for the porch. Dated to the mid-11th century, it is 143 cm high and 81 cm wide. The stone contains two inscriptions which read (translated): 'Áskell, Súlki's son, had this stone raised in memory of himself. Ever will stand, while the stone lives, this memento, which Áskell produced. May Christ and Saint Michael help his soul.' and 'Tóki carved the runes in memory of Þóra, his stepmother, a good wife.'
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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.