Since shuttering its iconic, Gio Ponti-designed North Building in November 2017, the Denver Art Museum has watched the steady pace of construction on a massive new welcome center and the pricey, complicated renovation of the North Building — which is being renamed the Martin Building. But starting in June 2020, museum officials will begin a “phased” reopening of the campus, culminating in the Martin Building’s 50th anniversary celebration in 2021, officials said this week. “Starting next summer, I am excited to begin welcoming our community back into these new, dynamic and creative spaces where they can explore art, world cultures and their own creativity,” said Christoph Heinrich, the Frederick and Jan Mayer director of the Denver Art Museum, in a press statement. Here’s how it will work: The first phase will see the opening of the newly constructed, 50,000-square-foot Sie Welcome Center and the recently announced Bartlit Learning and Engagement Center.