Constructed as a tower house in the late 14th century, Crichton Castle was expanded as power of the Crichton family grew. However, the Crichtons fell from favour in the later 15th century, and the castle passed to the Earls of Bothwell. Francis Stewart, 5th Earl of Bothwell, constructed the Italianate north range in the 1580s, featuring an elaborate diamond-patterned facade. After Bothwell was accused of witchcraft the castle fell into neglect. The ruins are now in the care of Historic Environment Scotland, and are open to the public. A mile to the south-west is Borthwick Castle, a 15th-century tower house that is still in use.
The castle's most distinctive feature is its Italian-influenced courtyard façade, which forms part of the north range. Francis Stewart, the designer, had travelled to Italy, and was inspired by new styles and technology in buildings there, particularly the Palazzo dei Diamanti in Ferrara (c. 1582). This was the source of the diamond rustication on the courtyard wall. The initials of Francis and his wife Margaret Douglas appear on the walls, together with an anchor representing Stewart's position of Lord High Admiral of Scotland. Inside are further innovations: Scotland's first 'scale-and-platt' stair, i.e. a modern-style staircase with landings and a drawing room to the north of the old tower.
To the south of the castle is a large stable block, with a horseshoe-shaped window and lodgings above.
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.