The Historic Park Inn Hotel and City National Bank are two adjacent commercial buildings located in downtown Mason City, Iowa, United States which were designed in the Prairie School style by the renowned architect Frank Lloyd Wright.

It was the first Frank Lloyd Wright-designed project in the state of Iowa, and today carries both major architectural and historical significance.

In 1999, the Park Inn Hotel was named on the Iowa Historic Preservation Alliance's Most Endangered Properties List.

[2] In 1907, when law partners James E. Blythe and J. E. E. Markley were looking for an architect to compete in quality with the eight-story bank building that would be built across the corner, they didn't hesitate to give the commission to Frank Lloyd Wright, a young architect who was building a reputation in the Chicago area.

During his subsequent visits, Drummond was commissioned to design a Prairie style home for a prominent Mason City family, not far away.

Nearby, overlooking Central Park from the west, the regal, stylish, 250-room Hotel Eadmar was newly-completed, and now open for business.

That year, the former City National Bank building and the former Park Inn Hotel, were sold, but as separate properties.

What almost no one knew, however, was that the Park Inn had been the only remaining hotel in the world designed by Frank Lloyd Wright, who, even years after his death, retained almost a legendary status as an architect.

Suddenly, seemingly overnight, Mason City had an architecturally, culturally, and historically significant treasure on their hands.

The Park Inn Hotel received a complete interior and exterior renovation thanks to numerous grants, as well as coordination at the local level.

This included a comprehensive restoration of the brick and terra-cotta façade, replacement of the art glass skylight windows, and a complete interior reconstruction.

[3] It builds on Mason City's rich architectural heritage, which includes a history deep in Prairie School architecture from not just Wright, but many of his associates who built in Mason City, including Walter Burley Griffin, Marion Mahony Griffin, William Eugene Drummond, and Francis Barry Byrne.