Robert Stuart MacArthur (July 31, 1841 – February 23, 1923) was a Baptist preacher, lecturer, and author.
He was a longtime pastor of the Calvary Baptist Church in New York City, raising it to prominence in his more than 40 years there.
He was ordained and became pastor of Calvary Baptist Church on May 15 of that year, and married Mary Elizabeth Fox on August 4.
MacArthur publicly aligned himself with the city's black clergy and pledged his support to stop the zoo's exhibition.
[6][7] With a 41 year tenure, MacArthur served the longest of any pastor in the history of Calvary Baptist Church.