The Iulia Hasdeu Castle in Campina is also known as the "Temple of Spirit", where the piano plays alone and the voice of Iulia is heard from time to time and where in some mornings the carpets are found folded and feathers fallen from gala hats, as after a dancing evening .

The writer and historian Bogdan Petriceicu Hasdeu built this castle between 1893 and 1896 in the memory of his daughter, Iulia Hasdeu. This was the refuge of Bogdan Petriceicu Hasdeu after his daughter's premature death. The purpose of this place was to facilitate the father's communication with his daughter through the spiritism sessions that took place in this location.

Iulia Hasdeu was an early child, at two years of age she could read, at four years she could write, at the age of five she composed her first poems, at the age of eight passed the primary school examinations and at eleven she finished the Saint Sava high school in Bucharest. At sixteen Iulia enrolled at the Faculty of Letters and Philosophy at Sorbonne University, the first Romanian student to study at the Sorbonne. Unfortunately, at age eighteen she contracted tuberculosis and at age nineteen (in 1888) she died. At age 20, Iulia Hasdeu would have been the first woman with a Ph.d to come out of the Faculty of Letters of the Sorbonne University in Paris.