Magic gate (<a href="https://en.wikipedia.org/wiki/w:Porta_Alchemica" class="extiw" title="en:w:Porta Alchemica">Porta Alchemica</a> or Porta magica) in Piazza Vittorio Emanuele, in Rome, Italy. The Latin text inscribed between the two circles reads: <i>TRIA SUNT MIRABILIA DEUS ET HOMO MATER ET VIRGO TRINUS ET UNUS</i>
<a href="//commons.wikimedia.org/wiki/User:Sailko" title="User:Sailko">Sailko</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>