Tomb of Lars Porsena

The tomb of the Etruscan king Lars Porsena (Italian: Mausoleo di Porsenna) is a legendary ancient building in what is now central Italy.

Each side was three hundred feet in length and fifty in height, and beneath the base there was an inextricable labyrinth, into which, if any-body entered without a clue of thread, he could never discover his way out.

These pyramids so taper in shape that upon the top of all of them together there is supported a brazen globe, and upon that again a petasus from which bells are suspended by chains.

[2] No trace of it has ever been found, and historians have generally regarded Varro’s account as a gross exaggeration at best, and downright fabrication at worst.

[citation needed] In the 18th century Angelo Cortenovis proposed that the tomb of Lars Porsena was a machine for conducting lightning.