3 He brought him in. The room was large and wide, 4 As it some gyeld or solemn temple were:

As > [As if] gyeld > {Guild, guildhall, the building where a guild met or in which a religious guild or fraternity lived} solemn > grand, imposing

5 Many great golden pillars did upbear 6 The massy roof, and riches huge sustain,

massy > solid, massive

7 And every pillar decked was full dear

full > very, exceedingly dear > richly

8 With crowns and diadems, and titles vain,

diadems > crowns (here somewhat pleonastic)

9 Which mortal princes wore, while they on earth did reign.

207.44