One of the most interesting features of the 20th-century esoteric revival in Italy is the rise of a lively spiritualist culture. Many spiritualist groups, while still paying attention to physical phenomena (levitation, apports, etc.), produced a rich doctrinal literature of increasingly sophisticated content. The 'Cerchio Firenze 77' is certainly the most famous among these groups. It emerged around the Florentine medium Roberto Setti (1930–1984) and was active throughout the 1950s, the 1960s and the 1970s. The doctrines exposed by the 'Masters' to the participants in the séances show a complex interweaving of esoteric themes, mystical ideas and scientific concepts that made the works of 'Cerchio' highly successful, and comparable to the great classics of 20th-century channeling, such as Jane Roberts's 'Seth books'.