Gov. David Ige has issued a proclamation marking the 175th anniversary of Washington Place, the Greek Revival home that serves as the governor's mansion.

Once the home of Hawaii's Queen Liliʻuokalani, it is the only official U.S. governor's residence that was once home to a monarch.

A public open house was being held on April 2 to debut a new exhibit on the queen. 

On April 23 and May 14, the public will be able to tour the home during other open houses. Pre-registration for the events is required.

"Washington Place's vision is to connect, engage, and inspire individuals to learn about Hawaiian history by providing access to its historical site and grounds, collection and its resources through exhibits, educational programs, and events," the proclamation said.

A virtual tour is available online.

Construction on the residence began in 1842 and was completed in 1847. Queen Liliʻuokalani lived at Washington Place for 55 years, according to the governor's proclamation. She was the last reigning monarch of the Kingdom of Hawaii.

Washington Place was designated a National Historic Landmark in 2007.