Dieleghem Abbey was founded in 1095 by the Bishop of Cambrai and administered by Augustinian canons. In 1140, the abbey’s monks switched to the rules of the Premonstratensian order. In the 13th century, the abbey now called Dieleghem possessed half of the commune’s territory and played an important social and economic role until the French Revolution. In November 1796, the Canons Regular were evicted and deported to an island off the shores of Brittany.
The abbey was looted and subsequently destroyed, sparing only the abbot's residence. The former residence of the abbot now houses the collections of the museum of the County of Jette.
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.