PRINCETON Princeton University Art Museum “Painting on Paper: American Watercolors at Princeton,” works by Edward Hopper and others. Through Aug. 30. “Collecting Contemporary, 1960-2015: Selections From the Schorr Collection,” works by Andy Warhol and others. Through Sept. 20. Tuesdays, Wednesdays, Fridays and Saturdays, 10 a.m. to 5 p.m.; Thursdays, 10 a.m. to 10 p.m.; Sundays, 1 to 5 p.m. Princeton University Art Museum, Princeton University Campus. artmuseum.princeton.edu; 609-258-3788.

PRINCETON Small World Coffee “Places I Remember,” Maxine Shore, oil paintings. Through Oct. 5. Reception: Sept. 20, 2 to 4 p.m. Small World Coffee, 254 Nassau Street. smallworldcoffee.com; 609-924-4377.

SAYVILLE Bay Area Friends of the Fine Arts Gallery “Indelible Moments,” an exhibition of photographs printed on canvas by photographer Holly Black. Sept. 12 through Sept. 26. Bay Area Friends of the Fine Arts Gallery, 47 Gillette Avenue. baffa.org; 631-589-7343.

SHREWSBURY Guild of Creative Art “Paul Hansen’s Arts Show,” paintings. Through Sept. 29. Tuesdays through Fridays, 8 a.m. to 4:30 p.m.; Thursdays, 8 a.m. to 7 p.m.; Saturdays, 10 a.m. to 3 p.m. Guild of Creative Art, 620 Broad Street. guildofcreativeart.org; 732-741-1441.

SUMMIT Visual Arts Center of New Jersey “Casey Ruble: Everything That Rises,” exploring history and race relations in New Jersey. Sept. 20 through Jan. 17. Reception: September 20, 2 to 4 p.m. “Adhere,” a site-specific installation. Sept. 20 through Jan. 17. Reception: Sept. 20, 2 to 4 p.m. Visual Arts Center of New Jersey, 68 Elm Street. artcenternj.org; 908-273-9121.

TRENTON The Trenton City Museum “An Opening Dialogue — The Nature of Abstraction” and “On Your Radar? Regional Abstractionists to Watch and Collect,” painting and sculpture. Sept. 19 through Nov. 8. Free. Tuesdays through Saturdays, 11 a.m. to 3 p.m.; Sundays, 1 to 4 p.m. The Trenton City Museum, Cadwalader Park. ellarslie.org; 609-989-1191.

WAYNE William Paterson University “Faculty Exhibition,” William Paterson University Galleries, South Gallery. Sept. 8 through Oct. 16. “Raymond Saá: New Work,” Court Gallery. Sept. 8 through Oct. 16. “Recent Indigenous Art of India.”. Sept. 8 through Oct. 16. William Paterson University, 300 Pompton Road. 877-978-3923; wpunj.edu.

WESTFIELD Gallery U “Across Water,” works by Michael Endy. Through Oct. 5. Mondays to Saturdays, 10 a.m. to 5 p.m., Sundays, noon to 4 p.m. Gallery U, 439 South Avenue West. 908-232-1895; gallery-u.blogspot.com.