South of the agora is a large, walled rectangular space, known as the Tariff Court, because this is where the great tariff stele (now residing in the St Petersburg Hermitage) was found. The enormous stone tablet dates from AD 137 and bears the inscription 'Tariff of Palmyra', setting out the taxes payable on each commodity that passed through the city.
The small structure at the north end of the court, closest to the theatre, has a semicircular arrangement of tiered seating leading archaeologists to believe that it may have been the city's Senate ( M04DA), or council building.