February 11, 1929 (Baba the first month of the first two days), the normalization of relations between the Holy See and Italy.

since the unification of Italy since the founding of the Roman Catholic Church and the Italian government relationship together, and refused to accept the Italian government made in 1871, the Law on the Protection of the Holy See. The day in 1929, the two sides signed the Lateran Agreement, normalization of relations with each other. The content of the agreement includes a total of three agreements: the first agreement to recognize the Pope of the Vatican City and outside the city's summer palace Castile Gan Dowler law has the right to rule; agreements to compensate for the Holy See in the unification of Italy in the founding of period (1859-1870), property damage, the total, 17.5 billion liras; third agreement provides Catholicism as the state religion of Italy, the church property tax exemptions, government payment teach soil remuneration., the monastery be legal status, government and recognition of the Church in regard to marriage the effectiveness of the law, the priest in primary and secondary schools to teach religious courses. Such an arrangement allows both the government and the Church are Mongolian Lee. Pope is no longer the prisoner of Vatican.