baldachin

noun

  1. A rich, embroidered brocade used for clothing in the Middle Ages, the web being gold and the woof silk.

  2. A canopy suspended over an altar or throne, originally made of this fabric; a ciborium.

  3. A building in form of a canopy, or a crown supported by pillars for the covering of an altar; a canopy carried over the host in Roman Catholic countries.