“A New Look at a Van Eyck Masterpiece” is a special focus exhibition that presents the findings of a recent study of the “Crucifixion” and “Last Judgment” paintings completed circa 1440-1441 by Jan van Eyck and his workshop. Van Eyck, an Early Netherlandish painter who worked in the Hague, Lilles, and Bruges, is considered one of the masters of the 15th century Northern Renaissance, though only a couple of dozen works have been definitely attributed to him. These two paintings are generally thought of as a diptych, but new infrared reflectography has allowed art historians to compare these two works to a recently discovered drawing of the Crucifixion attributed to Jan van Eyck now held in the Boijmans Van Beuningen Museum in Rotterdam to examine whether they were intended as that or they were originally part of a triptych or the doors of a tabernacle. Metropolitan Museum of Art, 1000 Fifth Ave. at E. 82nd St. Through Apr. 24: Sun.-Thu., 10 a.m.-5:30 p.m.; Fri.-Sat., 10 a.m.-9 p.m. Admission is $25; $17 for seniors; $12 for students; free under 12. Curator Maryan Ainsworth leads a conversation about the exhibition on Feb. 18, 11-11:30 a.m. “Rethinking Jan van Eyck: Discoveries from New Technical Investigations of His Paintings” is presented Apr. 17, 3-4:30 p.m. More information at metmuseum.org.