Short answers, pulled from the story.
The Chase Hotel opened on the 29th of September, 1922, built by developer Chase Ullman. The adjacent Park Plaza Hotel opened in 1929 as a rival, and the two buildings merged in 1961 under the name The Chase-Park Plaza.
Sam Koplar was the original owner of the Park Plaza Hotel, who lost it to foreclosure during the Great Depression. With help from a rabbi friend, he raised funds and rebought the Park Plaza from the insurance company in 1944, then became majority owner of the Chase Hotel in 1946, eventually merging both properties in 1961.
In 1953, Jackie Robinson publicly criticized the segregated hotels and restaurants serving the Brooklyn Dodgers organization. The Chase Hotel was among the establishments that integrated as a result of his criticism.
Wrestling at the Chase was a professional wrestling program produced and televised by KPLR-TV channel 11, running from 1959 to 1983. It featured well-known wrestlers including St. Louis native Lou Thesz and Buddy Rogers, and was broadcast from facilities located in the hotel and adjoining Park Plaza apartments.
Developer Jim Smith purchased the vacant Chase wing in 1997 and renovated it at a cost of $125 million, reopening the hotel in 1999 as The Chase Park Plaza.
The hotel is now called The Royal Sonesta Chase Park Plaza St. Louis, a name adopted on the 18th of May, 2017, when Boston-based Hospitality Properties Trust purchased the property for $94 million and contracted with Sonesta Hotels to manage it. It is part of the National Trust for Historic Preservation's Historic Hotels of America program.