The correct answer is an anthology. I said a monograph and it corrected me to anthology.
The answer to this question is entasis.
Entasis is a design principle in architecture where in a convex curve was applied to a surface which also serves a strength to the construction and it also gives an optical illusion to it. Egyptian pyramids use this design principle.
Typically, though not entirely, Islamic art has focused on the depiction of patterns, whether purely geometric or floral, and Arabic calligraphy, rather than on figures, because it is feared by many Muslims that the depiction of the human form is idolatry and thereby a sin against God, forbidden in the Qur'an.
I hope this helps!!!
