Collégiale Saint-Étienne - Credit: Wikimedia Commons
The Collegiate Church of Saint-Étienne or was a collegiate church dedicated to Saint Stephen founded in Troyes, France, in 1157 by Henry I, Count of Champagne. He intended it to become a mausoleum in which the grandeur of the House of Blois would be displayed, but that did not happen. The church was demolished during the French Revolution. Read more on Wikipedia
Source: en.wikipedia.org