Historical References
Zahari Zograf - the most famous Bulgarian painter of the Bulgarian National Revival
Bulgarian National Revival
Bulgarian Orthodox Church - history
Bulgarian Orthodox Church - official website
Early Bulgarian Church History - made simple

Conservation Training Programs
Nacionalna Hudozestvena Akademija
(formerly the Nikolai Pavlovich Higher Institute of Fine Art)

Professional Associations
AIC American Institute for Conservation of Historical and Artistic Works
WAAC Western Association for Art Conservation
BAACG Bay Area Art Conservation Guild

Restoration Ethics
AIC Code of Ethics