Church of Our Lady - Credit: Wikimedia Commons
The Liebfrauenkirche (German for Church of Our Lady) in Trier, is, according to UNESCO, "the earliest church built in French High Gothic style outside France." It is designated as part of the Roman Monuments, Cathedral of St Peter and Church of Our Lady in Trier UNESCO World Heritage Site. The Trier Dom (cathedral) is next to it, and the two buildings share a common wall. Read more on Wikipedia
Source: en.wikipedia.org