The former Lectoure Cathedral dominates the town and the belfry tower of 1488 can be seen at a distance as the town is approached. The repairs and modifications of the cathedral go back to the 12th century. The unadorned west front erected in the 15th century has been modified through the ages, and niches above the door have all but melted away due to the fragility of the limestone.
The nave was vaulted at the end of the 12th century, then repaired in 1480. Vaulted chapels were added at the beginning of the 16th century and more alterations followed in the 17th and 18th centuries. The choir and apse were also reconstructed at the beginning of the 16th century, and the five square apsidal chapels were completed. The ambulatory was created in 1600 by introducing ten cylindrical piers, and the carved early 17th century choir stalls were placed here in the 19th century. The stained glass is typically 19th century with a Tree of Jesse in the Chapelle de la Sainte Famille.References:
First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.
In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.