When was hymn-singing introduced into Christian churches?

Ambrose, bishop of Milan, introduced hymn-singing into Christian churches in A.D. 386.

When was incense introduced? Incense was introduced in A.D. 500.

What is the formal name for the Shakers? The official name of the celibate sect the Shakers is the United Society of Believers in Christ's Second Appearing. Derived from the Quakers, the "Shaking Quaker" sect was established in America in 1774…
Who were the Three Stooges? Making their debut in Soup to Nuts (1930), the Three Stooges were Moe Howard, Larry Fine, and a string of actors in the third role: Shemp Howard, Jerry "Curly" Howard, Joe Besser, and…
Lucille Ball and Desi Arnaz met on the set of which movie? Lucille Ball and Desi Arnaz met on the set of Too Many Girls (1940), produced by RKO and directed by George Abbott.
How many Americans did Jonathan Kozol estimate were illiterate in his book Illiterate America (1985)? Kozol said that as of 1984, 25 million Americans were functionally illiterate (reading not at all or at less than fifth grade level) and an additional 35 million were marginally illiterate (reading at…
Which brother in the Brothers Grimm was younger? Wilhelm Carl (1786-1859; Jacob, 1785-1863) was the younger brother. Their book Children's and Household Tales, now known as Grimm's Fairy-Tales, first appeared in 1812.
What is chamois? Chamois is a soft, warm leather and is the skin of the Alpine animal of the same name. More often, however, it is specially treated sheepskin.