Item si tertia episcenos futura erit, mediani plutei summum sit dimidia parte; columnae summae medianarum minus altae sint quarta parte; epistylia cum coronis earum columnarum item habeant altitudinis quintam partem.
If there is to be a third order, the top parapet is to be half of the middle one. The top columns are to be one quarter less in height than the middle; the architraves with the cornices are also to have one fifth of the height of those columns.
final_alignments\Vitruvius_Architecture_Book_5.json