Alchemical door

Porta Alchemica (English: alchemical door), or Alchemy Gate or Magic Portal, is a monument built between 1678 and 1680 by Massimiliano Palombara marquis of Pietraforte (1614–1680) in his residence, villa Palombara, located in the east part of the historic centre of Rome on the Esquilino hill in a position almost corresponding to Piazza Vittorio, where today was placed. Porta Alchemica is the only survivor of the five gates of the villa Palombara, there was a lost door on the opposite side enabling to give it a date of 1680, there were also four other inscriptions lost on the walls of the mansion inside the villa.