Construction works of the impressive church of Nuestra Señora de la Asunción began in the early 16th century. It was built on a former castle, the walls of which can still be appreciated in the main portal. Its nave is extraordinarily high and has a hall plan.
It is covered with ribbed vaults forming a star, which become even more intricate on their higher section, over the choir. Also worth mentioning is the access to the choir through a magnificent staircase with a stone handrail, covered with an oval vault in cut stone masonry and upper and lower doors decorated with pilasters. Its baptism font is a complete work of art; built on a ribbed column, it is covered in paneled decorations dating back to the 17th century. The main altarpiece is one of the most outstanding pieces of its kind in La Rioja region. It was built in the 16th century and gilded in the 17th century. A good number of the figures depicted narrate the life of Christ, his birth and childhood. There are also images of San Juan and Nuestra Señora del Rosario.
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.