Where did the Great Schism happen?
The Great Schism was the division of Chalcedonian Christianity into the Eastern (Greek) and Western (Latin) branches. The Great Schism began in Constantinople in 1053.
The word baptize comes from the Greek word 'baptizma' which means to immerse and completely cover in water. Sprinkling with water is called 'aspersion', but it is not the same as a baptism.
An Orthodox baptism is recognized by all Catholics, but Catholic baptisms are not recognized by all Orthodox, because Catholic baptisms are actually done by aspersion or sprinkling, rather than by full immersion (which is what the Greek word 'baptize' means) and baptism has been the tradition of the Orthodox Church for the last 2,000 years.