Which of these figures composed an influential set of rules for Christian monks?

One common issue facing those who work to conserve works of art is:

A. the effect of light. B. the work of earlier restorers. C. changing levels of heat and humidity. D. pollution. E. All of these answers are correct.

The seventeenth-century huqqa base (1.9.3) was created by an Islamic artist, or artists, in ________.

Fill in the blank(s) with the appropriate word(s).