Museo de Arte Dr. Pio López Martínez (205 Ave. Antonio R. Barceló, 787/738-2161, ext. 2209, Mon.–Fri. 8 a.m.–4:30 p.m., Sat.–Sun. and holidays 11 a.m.–5 p.m.) is an art museum dedicated to local artists with an emphasis on the work of Ramon Frade (1875–1954), who celebrated the island’s agricultural community with paintings that dignified the farmer and his contribution to society. Also featured are changing exhibitions of cartels, Puerto Rico ’s renowned poster art used to publicize festivals, plays, and social concerns.