Fortified with the Sacraments of Holy Mother Church Sunday, December 28, 2025.
Beloved husband of Sharon Callahan (nee Landwehr); loving father of Michael (Monica) and David (Tracie) Callahan; adoring grandfather of Audrey, Oliver, Ethan, Edward and Jaclyn; dear brother of Msgr, James Callahan and the late Sandra (surviving Harold) Province; dear brother-in-law of the late Gary Landwehr. Our dearest uncle, great-uncle, cousin and friend to many.
Memorial mass at Seven Holy Founders Catholic Church (6741 Rock Hill Road 63123) on Friday, January 9 at 1:30 pm. Interment at Jefferson Barracks National Cemetery was held in private.
My deepest condolences to all of the Callahans I know, and also to those I do not. Mr. Callahan was an incredibly funny, and good man. I am so very sorry for your loss.
I am so sorry to hear of the passing of Mike’s father. My heart breaks to hear such sad news. I am praying for you Mike, Monica, and for the rest of your family in this time of mourning. God bless you all.
I’m so sorry. I worked with Dennis at Murphy. One of my favorite people. ❤️
Surprised and saddened to hear of Dennis’s passing. We will miss seeing him in church and will miss his smile. Dennis loved White House Retreats and I enjoyed riding ther with him the past several years. Thanks to Dennis for his longtime support of ministries and organizations at Seven Holy Founders. He will be missed by anll who knew him. Our prayers and sympathy go out to Sharon and Dennis’s family and friends. Rest in peace 🙏🙏
Condolences to all who have lost Dennis to your lives. It has been decades since I have seen Dennis, but it seems he has lived a life rich with family and friends and will be well remembered by all. Again, my condolences to all for your loss.
I will always fondly remember float trips and other scouting outings wirh
Dennis and Sharon. Dennis was a genuinely nice and gentle man.