Mackintosh Church, Queen's Cross

This certainly isn't Art Deco architecture. In fact it was commissioned in 1896 by the Free Church (of Scotland?) but there is no denying that this small church in Queen's Cross, Glasgow is interesting architecture by Charles Rennie Mackintosh. It is the only church designed by Mackintosh and today serves as the headquarters of the CRM Society.

Reference:
www.mackintoshchurch.com