Llandovery went on to excel in the world of rugby and sport.
The college produced two players for the first Welsh international rugby fixture as well as being present when the WRU was created in 1881.
Its rugby roll of honour continues today.
Dominic Findlay, the warden of Llandovery College, said: “Our director of rugby is Nathan Thomas, former Welsh back row.
“We are connected with old boys like Alun Wyn Jones and George North.”
He added the college had “just brought three boys into the professional game with the Scarlets”.
“Our current number 10 is Carwyn Leggett Jones, who has just played in the under-20s. So the future is hugely exciting,” he said.