sentences:  In 1983 the Museum more than doubled its gallery and increased curatorial department by 30 percent, and added an auditorium, two restaurants and a bookstore in conjunction with the construction of the 56-story Museum Tower adjoining the museum.In 1997, the museum undertook a major renovation and expansion designed by Japanese architect Yoshio Taniguchi with Kohn Pedersen Fox.The project, including an increase in MoMA's endowment to cover operating expenses, cost $858 million in total.