Oyg's Map of Citadel of the Overlords {50-99} 

       +x-+--+
     + |  |  |
     x\x  +--+x-+
     | +         \
     1            +x-+
   Thrull            x
                     +
                     |
                     +
                     |
                     +x-+
                         \
                          +x-+
                             x
                             +--+
                             |  |
                             +--+
                             x  |
                             +  +
                              \
                               +x-+

1 = Thrull {1-50}

The arena and temple areas of the Citadel of the oerlords are shown separately on the Thrull map. click on the link above in order to see them

Key to Mystic Adventure ASCII Maps