MORE SLAVES IN THE CITY The exhibit “Slaves in New York,” which has broken attendance records at the New-York Historical Society, has been extended for an additional three weeks. The show explores slavery in the beginning of the state’s history. At the time of the American Revolution, there were more slaves in New York City than in any other city except Charleston, S.C. The exhibit includes paintings; newspapers; ledger books of slave voyages; ads for runaways; silver, furniture, and other objects made by enslaved people; manuscripts of the first abolition society, and the earliest paintings of black New Yorkers. Through Sunday, March 26, Tuesday-Sunday, 10 a.m.-6 p.m., New-York Historical Society, 170 Central Park West at 77th Street, 212-873-3400, $10 general, $5 seniors, students, and teachers, free for children under 12 and members.

SIX FEET UNDER The exhibit “Realms of History: The Cemeteries of Staten Island” examines the historical secrets within cemeteries, who is buried where, and efforts to restore abandoned cemeteries. Through March, Tuesday-Saturday, 9 a.m.-5 p.m., Sunday, 1-5 p.m., Staten Island Museum, 75 Stuyvesant Pl., between Hamilton Avenue and Wall Street, St. George, Staten Island, 718-727-1135, free.

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