Etsi multa (On The Church in Italy, Germany, and Switzerland) is a papal encyclical that was published by Pope Pius IX on November 21, 1873.

The encyclical stated that there were three campaigns being waged against the Church at the time: It condemned Freemasonry, which was blamed for the widespread attack on the Catholic Church, accusing it of being "the Synagogue of Satan", an expression taken from Revelation.

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