BALTIMORE — This spring, the Walters Art Museum debuts Across Asia: Arts of Asia and the Islamic World. The exhibition, which opened April 23 and is ongoing, features more than 600 works of art spanning 5,000 years and marks the first time in the museum’s history that its core Asian and Islamic art collections are on view together. Across Asia highlights the connections among art, cultures, religions and ideas across the vast geography of Asia, and includes examples of architecture, calligraphy, ceramics, cloisonne, enamelwork, lacquerware, manuscripts, metalwork, painting, sculpture and textiles.