Read this: Above the main portal there is generally a large window, like that at York Minster, or a group of windows such as those at Ripon Cathedral. In France there is generally a rose window like that at Reims Cathedral. Rose windows are also often found in the facades of churches of Spain and Italy, but are rarer elsewhere and are not found on the facades of any English Cathedrals. The gable is usually richly decorated with arcading or sculpture or, in the case of Italy, may be decorated with the rest of the facade, with polychrome marble and mosaic, as at Orvieto Cathedral.

What portion of Egyptian buildings are usually richly decorated with arcading or sculpture?
What is the answer? (If it cannot be answered, return "unanswerable")
unanswerable