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 Château du Haut-Koenigsbourg is situated in a strategic area on a rocky spur overlooking the Upper Rhine Plain, it was used by successive powers from the Middle Ages until the Thirty Years' War when it was abandoned. From 1900 to 1908 it was rebuilt at the behest of the German kaiser Wilhelm II. Today it is a major tourist site, attracting more than 500,000 visitors a year.
The first records of a castle built by the Hohenstaufens date back to 1147. The fortress changed its name to Koenigsburg (royal castle) around 1157. The castle was handed over to the Tiersteins by the Habsburgs following its destruction in 1462. They rebuilt and enlarged it, installing a defensive system designed to withstand artillery fire.
The fortification work accomplished over the 15th century did not suffice to keep the Swedish artillery at bay during the Thirty Years War, and the defences were overrun.