Manannan's tapestry

Manannan's tapestry is a tapestry in Manannan's House near Gwydion's bedroom.

Background
Behind the tapestry, the wall is filled with cracks, possibly why Manannan put the tapestry in that spot in the first place. The wall also has dozens of charcoal-scribbled drawings, diagrams, maps and notes to programmers with the legend King's Quest IV. However, when Gwydion looks behind the tapestry, he is uninterested in this information.

Behind the scenes
The tapestry acts an Easter egg hinting at KQ4.