The Gateway
From Tardis Wiki, the free Doctor Who reference
The Gateway was a structure located at the intersection between N-Space and E-Space (where the coordinates were at zero). It appeared to be the remains of an old castle which was probably constructed by the Tharils. Inside The Gateway were the mirrors, which were guarded by the Gundan robots, who walked the time winds where Humans could not.
The Gateway was partially destroyed when Rorvik attempted a backblast with his ship. (DW: Warriors' Gate)
