The Inquisition sentenced Galileo in June of 1633. He remained under house arrest for the rest of his life (1642), smuggling out his later works to be published in Holland, out of reach of the Church.
1616
There probably were a few people who believed him right when he came up with his theory. On 31 October 1992, 350 years after Galileo's death, Pope John Paul II gave an address on behalf of the Catholic Church in which he admitted that errors had been made by the theological advisors in the case of Galileo. He declared the Galileo case closed, but he did not admit that the Church was wrong to convict Galileo on a charge of heresy because of his belief that the Earth rotates round the sun. There probably were a few people who believed him right when he came up with his theory. On 31 October 1992, 350 years after Galileo's death, Pope John Paul II gave an address on behalf of the Catholic Church in which he admitted that errors had been made by the theological advisors in the case of Galileo. He declared the Galileo case closed, but he did not admit that the Church was wrong to convict Galileo on a charge of heresy because of his belief that the Earth rotates round the sun. There probably were a few people who believed him right when he came up with his theory. On 31 October 1992, 350 years after Galileo's death, Pope John Paul II gave an address on behalf of the Catholic Church in which he admitted that errors had been made by the theological advisors in the case of Galileo. He declared the Galileo case closed, but he did not admit that the Church was wrong to convict Galileo on a charge of heresy because of his belief that the Earth rotates round the sun.
1054 AD
1535.
Some religious people in the Catholic Church accused Galileo of being in error for his scientific assertion that the earth revolved around the sun; this contradicted Christian understanding of the Bible and in 1633, Galileo became a victim of the Inquisition; he was forced by the Pope to admit he was wrong about his theory. It would not be until 1992 that the Catholic Church, under Pope John Paul II, officially apologized for its persecution of Galileo. But while he was correct that the earth was not "fixed" as the church believed, Galileo did make some errors during his lifetime of scientific experimentation. Probably his biggest mistake was his 1616 theory about what caused the tides; he did not realize that there was a relationship between the moon and the tides, and instead attributed them to the earth speeding up and slowing down at different times of the day.
Pentecost Sunday in about the year 33 AD. is considered the birthday of the Catholic Church.
The Church does not stipulate a color for anniversaries.
Of course, as long as he has received a valid baptism.
1600
Galileo was arrested in 1823
Actually, the Lutheran Church did not technically "break off" from the Catholic Church. The Lutheran Church was made up out of whole cloth by the princes of northern Germany in 1517, I believe.
The Coptic Church is a branch of the Orthodox Church with whom a schism has existed since the year 1054.