Simplify the following text for a Grade 8 native English-speaking person.
Original: Saint Catherine of Alexandria , also known as Saint Catherine of the Wheel and The Great Martyr Saint Catherine ( Greek ' ) is a Christian saint and martyr who is claimed to have been a noted scholar in the early 4th century .
Simplified: Saint Catherine of Alexandria , also known as Saint Catherine of the Wheel and The Great Martyr Saint Catherine ( Greek ' ) is a Christian saint and martyr . She is believed to have been a well-known scholar in the 4th century .