The book is the first attempt to comprehend Bulgakov’s work as a single whole. The author of the book analyzes the “large” and “small” theological trilogies of Bulgakov (1871-1944), connects his sophiology with the philosophy of the Russian thinker, including in this unity his metaphysical teachings about language and icons. The researcher considers the phenomenon of Bulgakov the sophiologist in the context of the religious and philosophical views of the Silver Age. The book is intended for specialists and all those who are interested in Russian culture of this sophisticated era