Architecture & Morality is the third album by Orchestral Manoeuvres in the Dark (OMD), released in 1981. It became a commercial and critical success, selling over 4 million copies by early 2007 and being hailed as the band's seminal work. Its associated singles – "Souvenir", "Joan of Arc", and "Maid of Orleans (The Waltz Joan of Arc)", a retitled "Joan of Arc (Maid of Orleans)" – were international hits, selling more than 8 million copies combined.