Outside room 12.
Rooms 11-12-13 were part of the 6th century church, built in 520 AD to honor Saint Nicholas and to contain his tomb; it was erected on top of the foundations of the older Christian church where Nicholas served as bishop in the 4th century.
Correspondent: J.M.Criel, Antwerpen.
Source: Website of ‘stnicholascenter.org’ & Personal visits (1985-1989-2006) .