3 adjectives to describe architraves

Then we find the rectangular-cut blocks of stone in parallel courses, the heavy pier, the cylindrical column with its bell-shaped capital, and the bold and massive rectangular architraves extending from pier to pier and column to column, surmounted by a deep covered coping or cornice.

The feature common to all of them is a niche, of door or window shape, with a powerfully indented architrave.

Then we find the rectangular-cut blocks of stone in parallel courses, the heavy pier, the cylindrical column with its bell-shaped capital, and the bold and massive rectangular architraves extending from pier to pier and column to column, surmounted by a deep covered coping or cornice.

3 adjectives to describe  architraves