Thou art not, Penshurst, built to envious show,

Of touch, or marble; nor canst boast a row

Of polished pillars, or a roof of gold;

Thou hast no lantern whereof tales are told,

Or stair, or courts; but stand'st an ancient pile,

And these grudged at, art reverenced the while.

Thou joy'st in better marks, of soil, of air,

Of wood, of water; therein thou art fair.

Which of the following poetic forms is used in the excerpt?