Some people never quit.

"Papa Jack" Weil - who turned 106 Wednesday - is at his desk every weekday morning at Rockmount Ranch Wear, the LoDo Western wear company he founded in 1946.

"Papa Jack has always been the patriarch of our family," Steve Weil said of his grandfather. "He's been sort of a mythic figure for all of the family. Growing up, he was the go-to guy. He was the guy we went to with all of the trials and tribulations of growing up."

Jack A. Weil, who was born nearly three years before the Wright brothers made their first flight, does business in the same Wazee Street building where he founded his company, a historic brick structure dating to 1908.

Denver marked "Papa Jack's" birthday with a change of street signs - from Wazee Street to Jack A. Weil Boulevard.

The city began the annual tradition of the street sign change in Weil's honor the year he turned 100.