In 1930 the interior of ʻIolani Palace was remodeled, and wood framing replaced by steel and reinforced concrete.
The name ʻIolani Palace was officially restored in 1935.

During World War II, it served as the temporary headquarters for the military governor in charge of martial law in the Hawaiian Islands.

The Hawaiian soldiers of Japanese ancestry who were accepted for service in the U.S. Army became the core of the 442nd Infantry Regiment.
Before leaving Hawaii for training on the mainland, they were sworn in during a mass ceremony on the grounds of the Palace.

Through more than 70 years as a functional but neglected government building, the Palace fell into disrepair.
After Hawaii became a state, Governor John A. Burns began an effort to restore the palace in the 1960s.
The first step was to move the former ʻIolani Barracks building from its original position northeast of the palace.
It now serves as a visitors center for the palace.

ʻIolani Palace  was designated a National Historic Landmark on December 29, 1962 and added as site 66000293 to the National Register of Historic Places listings in Oahu on October 15, 1966.
Government offices vacated the Palace in 1969 and moved to the  newly constructed Hawaii State Capitol building on the former barracks site.
In preparation for restoration, the Junior League of Honolulu researched construction, furnishings, and palace lifestyle in nineteenth-century newspapers, photographs and archival manuscripts.
Overseeing the restoration was The Friends of ʻIolani Palace, founded by Liliʻuokalani Kawānanakoa Morris, grand-niece of Queen Kapiʻolani.
Two wooden additions were removed and the interior was restored based on original plans.

Through the efforts of acquisitions researchers and professional museum staff, and donations of individuals, many original Palace objects have been returned.
Government grants and private donations funded reproduction of original fabrics and finishes to restore Palace rooms to their monarchy era appearance.
ʻIolani Palace opened to the public in 1978 after structural restoration of the building was completed.
In the basement is a photographic display of the Palace, orders and decorations given by the monarchs, and an exhibit outlining restoration efforts.

The grounds of ʻIolani Palace are managed by the Hawaiʻi State Department of Land and Natural Resources but the palace building itself is managed as a historical house museum by the Friends of ʻIolani Palace, a non-profit non-governmental organization.
The birthdays of King Kalākaua (November 16) and Queen Kapiʻolani (December 28) are celebrated with ceremonies.

ʻIolani Palace is one of the only places in Hawaii where the flag of Hawaii can officially fly alone without the American flag; the other three places are Puʻuhonua o Hōnaunau Heiau, the Mauna ʻAla and Thomas Square.
In 1930 the interior of ʻIolani Palace was remodeled, and wood framing replaced by steel and reinforced concrete. The name ʻIolani Palace was officially restored in 1935.
During World War II, it served as the temporary headquarters for the military governor in charge of martial law in the Hawaiian Islands.
The Hawaiian soldiers of Japanese ancestry who were accepted for service in the U.S. Army became the core of the 442nd Infantry Regiment. Before leaving Hawaii for training on the mainland, they were sworn in during a mass ceremony on the grounds of the Palace.
Through more than 70 years as a functional but neglected government building, the Palace fell into disrepair. After Hawaii became a state, Governor John A. Burns began an effort to restore the palace in the 1960s. The first step was to move the former ʻIolani Barracks building from its original position northeast of the palace. It now serves as a visitors center for the palace.
ʻIolani Palace  was designated a National Historic Landmark on December 29, 1962 and added as site 66000293 to the National Register of Historic Places listings in Oahu on October 15, 1966. Government offices vacated the Palace in 1969 and moved to the  newly constructed Hawaii State Capitol building on the former barracks site. In preparation for restoration, the Junior League of Honolulu researched construction, furnishings, and palace lifestyle in nineteenth-century newspapers, photographs and archival manuscripts. Overseeing the restoration was The Friends of ʻIolani Palace, founded by Liliʻuokalani Kawānanakoa Morris, grand-niece of Queen Kapiʻolani. Two wooden additions were removed and the interior was restored based on original plans.
Through the efforts of acquisitions researchers and professional museum staff, and donations of individuals, many original Palace objects have been returned. Government grants and private donations funded reproduction of original fabrics and finishes to restore Palace rooms to their monarchy era appearance. ʻIolani Palace opened to the public in 1978 after structural restoration of the building was completed. In the basement is a photographic display of the Palace, orders and decorations given by the monarchs, and an exhibit outlining restoration efforts.
The grounds of ʻIolani Palace are managed by the Hawaiʻi State Department of Land and Natural Resources but the palace building itself is managed as a historical house museum by the Friends of ʻIolani Palace, a non-profit non-governmental organization. The birthdays of King Kalākaua (November 16) and Queen Kapiʻolani (December 28) are celebrated with ceremonies.
ʻIolani Palace is one of the only places in Hawaii where the flag of Hawaii can officially fly alone without the American flag; the other three places are Puʻuhonua o Hōnaunau Heiau, the Mauna ʻAla and Thomas Square.
ʻIolani Palace