The Detroit Institute of Arts, renowned for its Diego Rivera murals, has opened a public exhibition of his works and those of his wife, Frida Kahlo, thebiggest since the museum’s collection was threatened in the city’s bankruptcy.

Diego Rivera and Frida Kahlo in Detroit features nearly 70 works by the Mexican artists and is the first to focus on the 11 months they spent in Detroit in 1932 and 1933, when Rivera worked mainly on the Detroit Industry murals.

Rivera’s preparatory drawings for the 27-panel Detroit Industry frescoes, which have not been shown in nearly 30 years, are part of the exhibit that opened yesterday.

The idea for the exhibit arose more than a decade ago, but uncertainty over the city-owned institution’s finances and other setbacks delayed the process, museum director Graham Beal said. Dozens of works were obtained on loan from museums in the US and Mexico and from private collectors.

When the mural was finished, it was the most important piece of modern art in the US

“When we knew we had a life in front of us, we returned to the idea of the Rivera exhibition, based on the Rivera murals,” Beal said.

Curator Mark Rosenthal teamed with experts in labour, medicine and the city’s Mexican-American community to give visitors a sense of what life was like for the artists in Depression-era Detroit.

Rivera’s grandson Juan Coronel Rivera told reporters it was daunting to research his grandfather but that the project helped him better understand his contributions to modern art.

His research included reviewing archives of letters Rivera wrote to Kahlo when she left Detroit to be with her dying mother in Mexico.

“When the mural was finished, it was the most important piece of modern art in the US,” Rivera said. The artist, whose murals celebrating revolutionary themes often met with controversy in the US, considered the Detroit Industry murals his best work and they are among the museum’s most celebrated pieces.

In Detroit, Kahlo, a then unknown artist plagued by fertility issues and a distaste for American culture, developed her most recognisable works, including Henry Ford Hospital, which is on loan from the Museo Dolores Olmedo in Xochimilco, México.

The painting shows a mourning Kahlo in a hospital bed with a developed foetus outside her body but still attached by an umbilical cord. One hand holds a paint palette, representing her unrealised chance at motherhood and her role as an artist.

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