Original: He later continued studying in Vienna with Abbé Vogler (Georg Joseph Vogler), founder of three important music schools (in Mannheim, Stockholm, and Darmstadt); another famous pupil of Vogler was Giacomo Meyerbeer, who became a close friend of Weber.
Simplified: He also studied in Vienna with a famous musician called Abbé Vogler. Through him he got to know another of his pupils, Giacomo Meyerbeer, who became a famous composer and was a close friend of Weber.