Edmund Spenser invented a stanza form for his long poem "The Faerie Queene". He must have liked the pattern very much because the poem has six books, each book containing twelve cantos, each canto containing between fifty and eighty stanzas. You do the math!

The Spenserian stanza is nine lines long rhyming A B A B B C B C C. The first eight lines are written in iambic pentameter. The ninth line is written in iambic hexameter, giving the stanza a kind of extra kick to closure.

Here is a dragon being defeated by Spenser's Red Cross Knight:

The cruel wound enraged him so sore,
That loud he yelled for exceeding pain;
As hundred ramping lions seemed to roar,
Whom ravenous hunger did there to constraine:
Then gan he toss aloft his stretched traine,
And therewith scourge the buxom air so sore,
That to his force to yield it was faine;
Ne ought his sturdy strokes might stand afore,
That high trees overthrew, and rocks in pieces tore.

Did you catch the extra foot in the final line?