Creator
- Lyons, Robert T1
- Marshall & Fox (Firm)1
- Maryland Terra Cotta Co1
- Maynicke & Franke1
- McKenzie, Voorhees & Gmelin1
- Merchant, Alexander1
- Meyers, Charles B1
- Midland Terra Cotta Co1
- Milburn, Heister & Co1
- Mills, Rhines, Bellman & Nordhoff, Architects1
- Moore & Landsiedel1
- Morris, Montrose W., 1861-19161
- Mowbray & Uffinger1
- Murphy & Olmsted1
- Nechodoma, Antonín, 1877-19281
- Neville & Bagge1
- New Jersey Terra Cotta Co1
- New York Architectural Terra Cotta Company1
- New York Central Railroad Company1
- Nirdlinger, M1