Terza Rima
You might be able to get some sort of sense of what this poetry encompasses just by looking at the name of it. The lines in these types of poems are arranged in what are called "tercets." What this means is the lines come in groups of threes.
That does not mean that the poem is only three lines long. There can be multiple groups of three lines. Like the haiku, there are certain syllable requirements, as most poems written in terza rima have lines of 10 or 11 syllables.
The Italian poet Dante created this form, and his Divine Comedy is one of the best-known examples of the form. A stanza of this poem reads:
His glory, by whose might all things are mov'd,
Pierces the universe, and in one part
Sheds more resplendence, elsewhere less. In heav'n,
That largeliest of his light partakes, was I,
Witness of things, which to relate again
Surpasseth power of him who comes from thence;
For that, so near approaching its desire
Our intellect is to such depth absorb'd,
That memory cannot follow. Nathless all,
That in my thoughts I of that sacred realm
Could store, shall now be matter of my so