The Hilton Memphis is the tallest hotel in Memphis, Tennessee, United States. Located off Interstate 240 in East Memphis. the 27-story hotel was designed by Hawaiian-born Memphis architect Francis Mah and was built by Boyle Investment. Originally opened on September 15, 1975 as the Hyatt Regency Memphis, the hotel became the Omni Memphis Hotel in December 1989. Just over two years later, it was sold to Adam's Mark Hotels and became the Adam's Mark Memphis in May, 1992.