The 1906 YMCA building with its 1958 annex served as the main facility and headquarters building of the Denver Young Men’s Christian Association. Beginning in the late 19th century, the Denver YMCA provided the young city with cultural, scientific, technical, and religious programs. By the 1880s, the Denver YMCA was involved with social work and outreach to the poor and working classes, and began to provide facilities for athletics of various sorts.