Ambruster-Donnelly Mortuary 6633 Clayton Rd, Saint Louis, MO63117 Throughout decades of change and development in Clayton, Ambruster-Donnelly Mortuary has stood the test of time, and has…More been serving the community since 1931. Located on Clayton Rd., it is nicely appointed with beautiful stained-glass windows, stone walls, terrazzo flooring and Oriental rugs. The environment is classy and comfortable. There are three different parlors here, and the chapel features a baby grand piano and pipe organ. Rates are available upon request, and veterans may receive a special package.