Artist Frank Buffalo Hyde is featured at Gilcrease Museum’s exhibition I-Witness Culture, running through May 10, with a focus on Native Americans’ use of social media and the representation of today’s Native peoples. With a March 15 debut, Tulsa Treasures: Private Collections in Public is an exhibition at Philbrook Museum of 18th-century French objects, regional art, furniture and more. The show is meant to demystify the practice of collecting and answer the question: Why do people collect art?