The Freer Gallery of Art – the Smithsonian’s first art museum – will close for 18 months for renovations beginning Jan. 4, 2016, officials announced Wednesday.

Repairs to the 180,000-square-foot building, a National Historic Landmark, will include updating the climate control systems and installing technological upgrades to its auditorium and storage and conservation areas. In addition, some of the galleries will be returned to the original aesthetic created by architect Charles Platt.