The industrial history of Alingsås began in 1724 when Jonas Alström established there a factory. The factory had 1,000 employees already in the mid-18th century. The Alströmerska warehouse at the Lilla Torget is the city’s oldest secular building. It was built in the beginning of the 1730s and is the only property left from the Alströmerska époque. The building was first used by Jonas Alströmer to house materials used in manufacturing. In 1928 the museum took over the building and at first shared it with the library that is now located next door.
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.