A museum that houses a massive private collection of contemporary artwork will be expanding into its second building on a site nestled in a Maryland neighborhood. New York-based Thomas Phifer and Partners has designed a 150,000-square-foot complex for Glenstone, a not-for-profit art museum founded by billionaire industrialist Mitchell Rales and his wife, Emily Wei Rales. At a cost of approximately $125 million, according to The New York Times, construction is expected to start this summer...