mc5 - Cleri Who's Who

Four lines rhyming AABB - scansion, rhythm, metre and all that malarkey is as random as-u-like. Oh yes - the featured subject, usually a person, is mentioned in the first line.
Here's a full and frank(ly better) intro by Thos along with some that were made earlier.

This act spoke more eloquently of his feelings than any bombastic prose

Nicolas Copernicus

Software

Flatly refused to subscribe to the astronomical model proposed by the Catholic church and thus published De revolutionibus

Thus, and with no pun intended, he precipitated a revolution

Which was to presage a similar one which erupted a few centuries later when Darwin proposed his theory of evolution!