According to the Internet source given below, The Olympia Brass Band is a New Orleans jazz brass band. The original "Olympia Brass Band" was active from the late 19th century to around World War I.
In 1958, saxophonist Harold Dejan, leader of the 2nd unit of the Eureka Brass Band, split off to form the current Olympia, reviving the historic name.
In addition to playing for parades and parties, the band had a weekly gig at Preservation Hall on Sunday nights for many years. The band also toured Europe on numerous occasions and also toured Africa for the U. S. State Department. The band did a BBC radio broadcast for Queen Elizabeth's 25th wedding anniversary in 1972 while they were in London, and also played for Pope John Paul II on his visit to New Orleans.

Websites:
	Olympia Brass Band	Biography by wikipedia.org.