sentences:  First housed in six rooms of galleries and offices on the twelfth floor of Manhattan's Heckscher Building, on the corner of Fifth Avenue and 57th Street, the museum moved into three more temporary locations within the next ten years.Abby Rockefeller's husband, John D. Rockefeller, Jr., was adamantly opposed to the museum (as well as to modern art itself) and refused to release funds for the venture, which had to be obtained from other sources and resulted in the frequent shifts of location.Nevertheless, he eventually donated the land for the current site of the museum, plus other gifts over time, and thus became in effect one of its greatest benefactors.