Subject
- Ethnology -- Bulgaria10,116
- Landscapes -- Bulgaria10,116
- Marriage customs and rites -- Bulgaria10,116
- Material culture -- Bulgaria10,116
- Pottery -- Bulgaria10,116
- Literature10,051
- Law and legal affairs9,854
- Islamic manuscripts and books9,371
- Rites and Ceremonies9,202
- Music9,036
- Architecture8,762
- Indigenous populations8,513
- Portraits8,312
- Slavery8,105
- Church records and registers7,681
- Education7,654
- Land use7,483
- Commerce7,374
- Human settlements7,301
- Poetry7,293