Organ music from late renaissance and early baroque. Ricercar (from Italian ricercare = search) is an instrumental composition from the time of the late Renaissance and early baroque. The task of Ricercar was to select various variants and derivative forms of a theme by means of improvisation and imitation. Ricercar was a precursor from which more complex forms developed. Ricercar, and some research, is also an important theme of this CD. Ricercar offered itself as an ideal unified idea in the search for a name, which somehow unified the program of this CD, based on the period of creation of most works as well as their musical forms.