The Dalles Civic Auditorium will hold its third annual open house on Sunday. This year’s theme is “This Place Matters,” as National Historic Preservation Month begins with the arrival of May. Tours of the Civic, displays of local historic restoration and information on historic restoration will be available. Members of The Dalles Main Street and the City Historic Landmarks Commission will be participating, and the Civic will kickoff its capital campaign for theatre renovation. The open house will run from 11 a.m. to 3 p.m. on Sunday.