museum (n.)
1610s, "the university building in Alexandria," from Latin museum "library, study," from Greek mouseion "place of study, library or museum, school of art or poetry," originally "a seat or shrine of the Muses," from Mousa "Muse" (see muse (n.)). Earliest use in reference to English institutions was of libraries (such as the British Museum); sense of "building to display objects" first recorded 1680s.