A moratorium is in effect on adding information from Fire and Blood until December 20th.
The Patternmaker's Maze is a religious labyrinth located in Braavos. The priests of the Pattern claim that only those who learn to walk it properly will find wisdom.
The Patternmaker's Maze may be a reference by George R. R. Martin to The Pattern in the works of Roger Zelazny. House Rogers is also inspired by Zelazny.