Crusader Chapel on the Mount of Olives, 12th century

During the construction of the Church of All Nations in 1920, builders found a column two meters beneath the floor of the medieval crusader chapel. Fragments of a magnificent mosaic were also found. Following this discovery the architect immediately removed the new foundations and began excavations of the earlier church.

Also found on the site were the remains of a 4th century Byzantine basilica, destroyed by an earthquake in 746.