The article makes an attempt to the theoretical reconstruction of the figure of the Spanish thinker Xavier Zubiri (1898‒1983) as an original historian of philosophy on the basis of key works published both during the author’s lifetime and still out of print to give an idea of the thinker's distinctive view on development of all European philosophy. With this object in mind, we refer to the works published both during the life of the author, and going out of print to this day. Zubiri examined almost all the main topics of classical philosophy: matter and essence, evolution and the issue of free will, the history and problem of God. This great philosophical synthesis, we only need to understand and apply new regional knowledge.