General Patrick Hurley opened the Ambassador Hotel in 1929, intending it to be a luxury "extended stay" residence for Tulsa businessmen (mostly oil business top executives), who were building mansions that were not yet ready for occupancy.

An investment group bought the property in 1999, and spent heavily on restoration before reopening it as a boutique hotel, a niche market it continues to occupy.

In 2014, the Ambassador agreed to rebrand itself as part of the Autograph Collection Hotels of Marriott International.

The Ambassador became housing for retired seniors after the oil business declined in Tulsa, and closed altogether in 1987.

Real estate developer Paul Coury and a group of investors bought the building in 1999 and began a $5.5 million restoration.

[5] The Ambassador Hotel was listed on the National Register of Historic Places (NRHP) on November 17, 1999, under Criterion C.[b] According to the NRHP application, the Ambassador is "...the best remaining example of a large, multi-story Mission/Spanish Colonial Revival building designed for domestic use in the Tulsa downtown area".