Aktiebolaget Operakällaren, Konferens
| Ecolabel | Nordic Swan Ecolabel |
| Category | Conference facility without accommodation |
| Product group | Food services and conference facilities (without accommodation) 110 |
| Criteria generation | 1 |
| Licensee | Aktiebolaget Operakällaren |
| License number | 3110 0139 |
| Brand | Operakällaren |