The Met's permanent collection is curated by seventeen separate departments, each with a specialized staff of curators and scholars, as well as six dedicated conservation departments and a Department of Scientific Research. The permanent collection includes works of art from classical antiquity and ancient Egypt, paintings and sculptures from nearly all the European masters, and an extensive collection of American and modern art. The Met maintains extensive holdings of African, Asian, Oceanian, Byzantine, and Islamic art. The museum is also home to encyclopedic collections of musical instruments, costumes and accessories, and antique weapons and armor from around the world. A great number of period rooms, ranging from first-century Rome through modern American design, are permanently installed in the Met's galleries. In addition to its permanent exhibitions, the Met organizes and hosts large traveling shows throughout the year.