In 1984 Irina graduated from the Sorbonne Law School, where she studied international law. Six years later she got her Ph.D. at the Institute of Political Studies in Paris. Her Ph.D. thesis was about the relations of the Soviet government with unofficial artists. Later it was published as a book titled ‘Brush, Sickle, and Hammer. Power and artists in the Soviet Union in 1953-1989’.
There was also a period in the life of Irina Semyonova-Tyan-Shanskaya when she moved to Moscow for three years and worked at the Pedagogical University. During this period she visited the church under the City Clinical Hospital №1 and different regions of the USSR. Also in the summer of 1991, she was in the group of pilgrims, which followed from Moscow to Nizhny Novgorod and Diveevo village with the relics of Blessed Saint Seraphim of Sarov.
Irina Semyonova-Tyan-Shanskaya conducted scientific research, wrote about the Russian Orthodox Church, and authored many articles in French and Russian academic journals and collections. Since 2001 Irina is an associate professor of the Department of Russian Philology at the University of Caen. In the summer of 2011, Irina Petrovna, her husband Valeriy Baidin, and her daughter Melania visited the Museum- Estate of P. P. Semyonov-Tyan-Shansky in Ryazanka and donated photographs from the family album of the French branch of the Semyonov-Tyan-Shansky. So, her book with the inscription became a part of the museum collection