The University of Iowa is planning to build a museum to house its $500-million art collection, which includes works by Jackson Pollock, Marsden Hartley, Stuart Davis, Henri Matisse, and Pablo Picasso. Officials working on the project have selected the Des Moines-based firm BNIM Architects to design to the structure, which is expected to cost $60 million to realize. The plan will be reviewed by the Iowa Board of Regents this week.