Triclinium Facade at Little Petra in Jordan. The façade of the Triclinium is a beautiful example of simple classic Nabataean architecture. Defining the portico are four columns. Two of them are considered engaged or pilasters. All of them have horned capitals. Notice the narrow steps on the left. Several of these carved, worn and sometime treacherous staircases are seen throughout Little Petra. They reached the second stories of buildings or the upper level of the town.