The Detroit Institute of Arts (DIA) is a renowned art museum in the city of Detroit. In 2003, the DIA ranked as the second largest municipally owned museum in the United States, with an art collection valued at more than one billion dollars. With over 100 galleries, it now covers 658,000 square feet (61,130 m²); a major renovation and expansion project completed in 2007 added 58,000 sq.