Baldachin

n.	1.	A rich brocade; baudekin.
	2.	(Arch.) A structure in form of a canopy, sometimes supported by columns, and sometimes suspended from the roof or projecting from the wall; generally placed over an altar; as, the baldachin in St. Peter's.
	3.	A portable canopy borne over shrines, etc., in procession.

Noun

1.

baldachin - ornamented canopy supported by columns or suspended from a roof or projected from a wall (as over an altar)

canopy