Sylvester Stallone's son Sage laid to rest in Los Angeles Toby Canham / Getty Images A memorial service for Sage Stallone was held Saturday at the St. Martin of Tours Catholic Church in Los Angeles. Sylvester Stallone and his ex-wife Sasha Czack's 36-year-old son, Sage Stallone, was laid to rest on Saturday. The family gathered at St. Martin of Tours Catholic Church in Los Angeles to say goodbye, E! News reports. PHOTOS: Stars gone too soon Sage was found dead in his Los Angeles apartment on July 13. His cause of death remains unknown pending toxicology test results. "When a parent loses a child there is no greater pain," the 66-year-old "Rocky" star said in a statement about his son, a filmmaker and actor. Therefore I am imploring people to respect my talented son's memory and feel compassion for his loving mother Sasha. PHOTOS: Stars we've lost He added: "This agonizing loss will be felt for the rest of our lives. Sage was our first child and the center of our universe and I am humbly begging for all to have my son's memory and soul left in peace. PHOTOS: Famous Hollywood dads Sage's mother asked mourners to make a donation to Autism Speaks rather than sending flowers. Czack and Sylvester's youngest son together, Seargeoh, is autistic. Sage is also survived by his half-sister Sistine, Sophia and Scarlet. New details have surfaced about the lifestyle of Sage Stallone, the 36-year-old son of Sylvester Stallone who was found dead in his Hollywood Hills home last week.