He learned to play the organ through the teachings of a cousin of his father. He quickly developed a huge interest for it, and became a very famous organist in many churches in his native country, Germany.
He held the position of organist in many churches throughout his career. He loved the religious music and that influenced his compositions.
Bach is considered one of the last great baroque composers.
Hierarchical scale is the use of scale to indicate relative importance. In the royal altar to the hand, the king is at the center because he is the most important followed by his attendants.