Drawing of a church interior with baldachin

Detailed drawing of church interior (?) with a dome and with a raised area against the background, leading up to which on the left and right is a staircase; above this in the centre is a drawing of a cloud, in which there is a shining chalice with a crown; on the left kneels a male figure and on the right, a woman. Above the whole, two putti are holding up a drape.