Image credits

HEADER: The ceiling of the Sheikh Lotf Allah mosque.
Isfahan, Iran (1615-18 CE).
Photograph: Phillip Maiwald. Image source: Wikimedia Commons.

FOOTER: Detail from the Book of Kells, f° 34r (a.k.a. the Chi-Rho Carpet Page).
Dublin, Trinity College Library, MS A. I. (58). (Ca. 800 CE).
Image source: the Yorck Project c/o Wikimedia Commons.

The ceiling of the Cappella Palatina.
Palermo, Sicily (1140-43 CE)

The Fra Mauro World Map
Biblioteca Nazionale Marciana, Venice (1459)