The Grand Ole Opry is a weekly country-music stage concert in Nashville,
Tennessee, which was founded on November 28, 1925, by George D. Hay
as a one-hour radio "barn dance" on WSM.

From October 15, 1955 to September 1956, ABC-TV aired a live, hour-long
television version of the Opry once a month on Saturday nights, sponsored
by Ralston-Purina, pre-empting one hour of the 90-minute Ozark Jubilee. 

From "Grand Ole’ Opry" in 1955. It’s the first TV appearance of
Patsy Cline.