At age nineteen Klein is at Paris for a short period when he received encouragement from Choron but small help from Cherubini. He was essentially a self-taught musician and upon his departure from Paris, came back to his house in Cologne and was permitted to conduct nonprofessional concerts in the cathedral. Klein was afforded the chance of planing a trip to Berlin to review the teaching methods of Zelter. This came into being due to the reputation of his skill by Thibaut who also became Klein’s friend. He remained in Berlin getting acquanited using the Institute for Cathedral Music and trained singing on the School. He spent a calendar year in Rome where he fulfilled Santini and could study about previously music. Klein was regarded for his sacred choral parts and notably dubbed the “German Palestrina.” Masses and oratorios constructed by Klein had been similar to Handel. Though afterwards criticized by Schumann, Klein established what of his music in a straightforward syllabic style. The amount of lieder that Klein constructed exceeded a hundred.