The man who founded what has become a fast food staple in the US has died. S. Truett Cathy passed away at 93.

According to a statement released by Chick-fil-A, Cathy died early Monday morning in his home surrounded by loved ones.

Cathy's religious upbringing shaped the business -- something the company won't change:

Cathy was a devout Southern Baptist who taught Sunday school to 13-year-old boys for more than 50 years. As an extension of the founder's faith and the clearest example of incorporating biblical principles into the workplace, all Chick-fil-A restaurants—without exception—operate with a "Closed-on-Sunday" policy. Rare within the food service industry, this policy allows employees a day for family, worship, fellowship or rest and also underscores Cathy’s desire to put principles and people ahead of profits. Chick-fil-A will remain privately held and closed on Sundays.

Cathy is survived by his wife Jeannette McNeil Cathy, sons Dan T. and Don "Bubba" Cathy, daughter Trudy Cathy White, as well as 19 grandchildren and 18 great-grandchildren.

[via ABC News]