The Holy Roman Empire was a highly decentralized state for most of its history, composed of hundreds of smaller states, most of which operated with some degree of independent sovereignty.
The membership of the Imperial Diet in 1792, late in the Empire's history but before the beginning of the French Revolutionary Wars, gives some insight as to the composition of the Holy Roman Empire at that time.
The year 1792 was just before the vast changes inspired by the French Revolutionary incursions into Germany.
Certain territories which had once held votes in the Diet, as for instance the County of Waldeck or the United Duchies of Jülich-Cleves-Berg, no longer retained them, due to the extinction of a dynasty or other causes.
The two benches of the Council of Princes each contained single-vote colleges.