Complex sentence: He had established a well-organised studio in order to meet the many large commissions from England, France, Spain and Bavaria and other locations, and relied on students and collaborators for much of the actual work.
Split into simpler sentences: He had established a well-organised workshop that met the demands of his active studio, including large commissions from England, France, Spain and Bavaria and other locations. He relied on students and collaborators for much of the actual work.