The Grosse Horloge of La Rochelle is a former city gate dating back to the original fortifications known as Guillaume X. It received a bell and clock in 1478, becoming the city's belfry, replacing the Mallevault gate.
Originally a gate in La Rochelle's fortified city, part of the early medieval fortifications, the Grosse-Horloge was built in the early 12th century during the construction of the first medieval enclosure. The gate featured two openings: a wider one for carts and a smaller one for pedestrians.
In 1478, an octagonal bell tower was added, topped with a campanile housing the clock bell. This upper part closely resembled the Cailhau gate (except for the central window). In 1672, the two openings were merged into a single arch to facilitate traffic.
In 1746, the upper part of the structure was demolished to make way for the current Louis XV-style cartouche flanked by scientific and military attributes.
Today, it remains one of the main passage points between the quays and the old town. For a few years, it also housed an archaeological museum related to the Templars of La Rochelle.
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.