First stadium tour by a musician

While The Beatles (UK) set long-since-broken attendance (55,600) and gross revenue ($304,000) records with their historic Shea Stadium concert in New York, USA, on 15 August 1965, it was Elvis Presley (USA, 1935–77), eight years earlier, who established the blueprint for stadium rock concerts with his five-date tour of the Pacific Northwest in August and September 1957. Elvis’ performance at the Memorial Stadium in Spokane, Washington, USA, on 30 August 1957 is widely regarded as rock music’s first significant outdoor stadium concert. The four-day, five-date tour continued until 2 September. See first source for full itinerary.