Collection place
- O'ahu, Hawaiian Windward Islands, Hawaiian Islands1 objects
- Oaxaca City, Oaxaca, Mexico1 objects
- Oaxaca, Mexico1 objects
- Obulco (ancient place), Hispania Ulterior2 objects
- Occitanie, France13 objects
- Oceania44 objects
- Ocumicho, Michoacan, Mexico17 objects
- Odessus, ancient Thrace2 objects
- Ontario, Canada4 objects
- Oreus (ancient place)1 objects
- Orippo (ancient place), Hispania Ulterior1 objects
- Orsoy, North Rhine-Westphalia, Germany1 objects
- Orvieto, Umbria, Central Italy3 objects
- Oschersleben, Saxony-Anhalt, Germany8 objects
- Ostseebad Arendsee, Mecklenburg-Vorpommern, Germany3 objects
- Ostseebad Graal-Müritz, Mecklenburg-Vorpommern, Germany3 objects
- Osuna, Sevilla, Spain1 objects
- Ottawa, Ontario, Canada4 objects
- Ottensheim, Upper Austria4 objects
- Oxfordshire, South East England1 objects