Cloaked in intrigue, Freemasonry is best known perhaps for its secret handshakes and initiation rituals. The fraternal organisation traces its origins to medieval stonemason guilds, so it's no surprise then that architecture has always played an important role in Freemasonry – and their buildings are packed with meaning.

Click or scroll through to decode the mysteries of the movement's secretive structures, tour the world's most impressive Masonic lodges and decipher the symbols that have fuelled conspiracy theorists for centuries.