What other works did Bach complete in Leipzig?

Bach completed the second volume of Equal Rhythm Piano Music Collection in Leipzig era, and began to write the essence of his life's music thought-The Art of Fugue. However, due to long-term concentration on composition and overwork, Bach's health gradually went wrong: his vision was seriously reduced, his heart was not very good, and his eyes were unfortunately blind after two operations. However, before he was completely blind, Bach still devoted himself to music with vague vision and tirelessly continued to create fugue art.