Mitchell Corn Palace (in Mitchell, South Dakota) is one of those wonderful, unique (and a little odd) examples of Americana that so many of us love. While I'd been aware of this place since I was a child, I didn't really know much about it. Wikipedia to the rescue!
In the late 19th Century, a number of cities on the Great Plains constructed "crop palaces" (also known as "grain palaces") to promote themselves and their products. As the idea succeeded, it spread, including: a Corn Palace in Sioux City, Iowa, that was active from 1887–1891; a Corn Palace in Gregory, South Dakota; a Grain Palace in Plankinton, South Dakota; and a Bluegrass Palace in Creston, Iowa.[3] From 1887 to 1930, at least thirty-four corn palaces were built across the Midwest United States; only the Mitchell Corn Palace has remained intact.
Notice the large panels on the side of the building (seen here in 1962), decorated with multicolored corn cobs, and what I assume is corn silk on those cylindrical features. This is known as "crop art".

Here's another view from 1962. The original Mitchell Corn Palace (known as "The Corn Belt Exposition") was built in 1892 to showcase the rich soil of South Dakota and encourage people to settle in the area. It was a wooden castle structure on Mitchell's Main Street, constructed on land donated by Louis Beckwith, a member of the First Corn Palace Committee.[5] In 1904–1905, the city of Mitchell mounted a challenge to the city of Pierre in an unsuccessful attempt to replace it as the state capital of South Dakota. As part of this effort, the Corn Palace was rebuilt in 1905. In 1921, the Corn Palace was rebuilt once again, with a design by the architectural firm Rapp and Rapp of Chicago. Russian-style onion domes and Moorish minarets were added in 1937, giving the Palace the distinctive appearance that it has today.
So much reading! Sorry.
As you can see in this probably-1950s photo, the crop art murals were in the midst of being redone. The exterior corn murals are replaced and redesigned each year with a new theme, with designs created by local artists. From 1948 to 1971, the artist Oscar Howe designed the panels. Calvin Schultz designed the murals from 1977 to 2002. From 2003 to 2017, the murals have been designed by Cherie Ramsdell. No new mural was created in 2006 due to an extreme drought. Beginning in 2018, designs have been created by Dakota Wesleyan University students. As of 2018, it costs an estimated $175,000 each time the Palace is redecorated.

The Corn Palace is used as a concert venue for many musical acts, some listed on Wikipedia. Johnny Cash thrice (once in 1968), The Beach Boys in 1969, Willie Nelson twice (once in 2003), Brad Paisley in 2004, Styx twice (once in 2005), Chubby Checker in 2005, Weird Al Yankovic in 2007, David Cook in 2009, Charlie Daniels Band in 2012, Billy Currington with Jake Owen in 2012, The Turtles with Mark Lindsay in 2013, Warrant with FireHouse in 2014, Pat Benatar in 2014, and Theory of a Deadman in 2015.
I don't know who Brad Paisley is, or Billy Currington & Jake Owen are, I'm guessing they are country acts? I'm not up on that stuff. If it ain't polka, I don't want to know.
I hope you have learned a little something about the Mitchell Corn Palace!