Whats the stanza form Robert Browning invented for Love Among Ruins?

Robert Browning did not invent a new stanza form for "Love Among the Ruins." He uses a traditional Italian sonnet (also called Petrarchan sonnet) for the poem, which has the following structure:

* Octave: Eight lines with the rhyme scheme ABBAABBA

* Sestet: Six lines with the rhyme scheme CDECDE or CDCDCD

The poem is written in iambic pentameter, meaning each line has ten syllables with an alternating pattern of unstressed and stressed syllables.