indiction

A 15-year cycle used as a chronological unit in ancient Rome and incorporated in some medieval systems.

A declaration; proclamation.

A fiscal period of fifteen years, established by Constantine the Great after the reorganization of the Roman Empire, being the term during which the annual tax on real property was paid on the basis of a valuation made and proclaimed at the beginning of each quindecennial period. This became a common and convenient means for dating ordinary transactions.

Hence In chronology, a year bearing a number, or the number attached to the year, showing its place in a cycle of fifteen years, counting from a. d. 313.

Declaration; proclamation; public notice or appointment.

A cycle of fifteen years.

A fiscal period of fifteen years, instituted by Constantine in 313 CE (but counting from 1st September 312), used throughout the Middle Ages as a way of dating events, documents etc.

A declaration or official announcement.

The decree made by Roman Emperors which fixed the property tax for the next fifteen years.

a 15-year cycle used as a chronological unit in ancient Rome and adopted in some medieval kingdoms