In the past, the whole city was surrounded by walls and was entered through about ten gates.
The Twin Gates (there are two arches), were built between the 2nd and 3rd centuries, and they lead to the Archaeological Museum and the Castle.
Porta Gemina (Double gate) - was built at the turn of 2nd to 3rd century in place of an older gate. Most probably, the gate had a decorative character as it stood at the entrance to the theatre. The gate has two indentical arched openings that opened to a sort of inner courtyard. It is decorated with three semi-columns with composite capitals, and the arches itself are of simple profile. The whole composition is near the top linked by a horizontal garland with relief decoration.
Dvojna vrata (Double Gate) or Porta Gemina was built at the turn of the 2nd to 3rd century in the place of an older gate. Most probably, the gate had a decorative character as it stood at the entrance to the theatre.
Right behind the Double Gate there is the Archaeological Museum of Istria and above it, on the top of the hill, the fortress of Kastel.
Also known as The Twin Gate , from the 2nd century.
In ancient and medieval times walls surrounded the whole town and the passage was made possible by ten gates. The walls had become old and unnecessary so they were pulled down at the beginning of the 19th century.
Parts of the walls have been preserved between the Twin Gate and the square Giardini. The Twin Gate, thus called because of the two arches through which you enter the inner garden which was once the entrance to the same city, was constructed between the 2nd and 3rd century. It leads to the Archaeological Museum and the Castle.
The Double Gate leads to a garden where the Archeological Museum is located and - beyond it - to the hill with remains of the old Roman Theater and the Venetian fortress. The Gate probably dates back from 2nd century.