REMOVE

1. Paintings
2. Mural
3. Fine Arts Museums of San Fra …
4. Unknown
5. Mexico
6. 750
7. 600

WHAT

1. volcanic ash, lime coatin … (1)

WHERE

1. Mexico (1)
2. North American; Central A … (1)

WHO

1. Fine Arts Museums of San … (1)

WHEN

1. 600 - 750 (1)