There will be a big birthday bash later today... for the Minnesota State Capitol. There will be music, tours, and an ice cream social to celebrate the Capitol's 100th birthday. The building first opened in 1905 after nearly 12 years of planning and construction. Since then, it's been a hub of government and one of the state's most important public buildings. Leigh Roethke is completing her doctorate in art history at the University of Minnesota and is the author of a new book called "Minnesota's Captiol: A Centennial Story." She says when St. Paul architect Cass Gilbert was chosen to design the building, he had big ideas.