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 claimed 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".
References
Etsi multa Wikipedia(Text) CC BY-SA