Completed the following sentence: Most notably, Galloway was the official organist for the
1904 Louisiana Purchase Exposition in St. Louis, where he debuted the great organ in Festival Hall (now preserved as the nucleus of the Wanamaker Organ at Macy's Center City in Philadelphia) which was the largest organ in the world at that time. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ He also served as the conductor of the most respected men's and women's choral ensembles in the St. Louis area: the Apollo Club of St. Louis and the Morning Choral Club, respectively. As an educator, Galloway taught at various institutions, including the Strassberger Conservatories of Music, Washington University, and Lindenwood College.) ️<unk>️<unk>️<unk>️<unk>️<unk>️