From late 70s to 1994 this painting was part of Tehran Museum of Contemporary Art collection, but after the revolution in 1979, this painting could not be shown because of strict rules set by the government about the visual arts and what they depict.
I think From late 70s to 1994 should be corrected as From the late 70s to 1994. Am I right?
I need native speakers' help.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
***** NOT A TEACHER *****
I also would feel more comfortable with "... was part of the Tehran Museum of Contemporary Art collection, ..."
Of course, I know nothing about Wikipedia, but I have noticed that when I read some of its articles, it appears that some of the writing was not done by native speakers of English.