Calendarium Naturale Magicum Perpetuum was created in 1619.
Perpetuum was created on 2010-11-25.
Perpetuum Fritule was created on 2009-11-07.
Café Naturale was created on 2004-05-24.
AwE NaturalE was created on 2012-03-27.
Perpetuum Mobile - album - was created on 2004-02-10.
Africa - Perpetuum Jazzile album - was created on 2009-10-30.
Riserva naturale orientata Parma Morta was created in 1990.
Museo storia naturale di Pisa was created in 1596.
Museo di Storia Naturale di Venezia was created in 1923.
Museo di Storia Naturale di Firenze was created in 1775.
Civico Museo di Storia Naturale di Trieste was created in 1846.
The word "calendar" originates from the Latin word "calendarium," which referred to a financial account book or a register of debts. The term itself is derived from "calendae," meaning the first day of the month in the Roman calendar when debts were due. Over time, "calendar" evolved to refer to the system for organizing days and months. Thus, it was not created by a single individual but rather developed through linguistic evolution in ancient Rome.