Clerihew
A clerihew is a humorous verse, rather similar to a limerick form that generally uses the name of a well known person for one of its rhymes.
They give potted history on particular person, but they can also be about different subjects as well as in this example:
Links on the web:
Worked swiftly if not gently,
Tracking murderers down by a hidden clew
In whodunit and clerihew.
Is different from Geography,
Geography is about maps;
And Biography is about chaps.