dye, but instead the result of a suspension of solid gold nanoparticles. In 2003, the Lenten cloth was restored and backed with a supporting material. It now weighs over a ton, and so must be carried from the workshop with heavy machinery for its use during Lent. Bells The cathedral holds 19 bells, altogether 25 tonnes, making it one of the largest peals in Germany. Burials Berthold V, Duke of Zähringen The Locherer family (altarpiece by Hans Sixt) Legal situation From the time of its construction, the cathedral was not owned by the Roman Catholic Church but by the people of Freiburg. In the Middle Ages, the situation changed so that the building was self-owned, and administered by a guardian appointed by the people of the city. More recently, the Münsterbauverein association was created, which now legally owns the cathedral. Conservation For the conservation of the cathedral, the Freiburger Münsterbauverein ("Freiburg Minster-Upkeep Association") was established. The association invests several million euros each year in the care and maintenance of the building and its interior. The present architect in charge is Yvonne Faller and the chair of the association is Sven von Ungern-Sternberg. Gallery See also The Ten Virgins List of tallest structures built before the 20th century External links This article is based on a translation of the German Wikipedia article Freiburger Münster''. Cathedral windows References Roman Catholic cathedrals in Baden-Württemberg Minster Gothic architecture in Germany Tourist attractions in Freiburg im Breisgau Burial sites of the House of Zähringen