Duration of English parliaments before 1660

This article augments the List of parliaments of England to be found elsewhere (see link below) and to precede Duration of English, British and United Kingdom parliaments from 1660, with additional information which could not be conveniently incorporated in them. The definition of which bodies should be classified as parliaments becomes increasingly problematic before the accession of the Tudor monarchs, starting with Henry VII of England.

Source: Wikipedia — Duration of English parliaments before 1660 (CC BY-SA 4.0)