They were held every four years up to the mid-3rd century CE.
It died out around the 9th or 10th century CE.
The term appeared around the 1st or 2nd century CE.
Most of the remains date from the 2nd to 4th century CE.
The market dates from the middle of the 1st century CE.
It was built in the second quarter of the 2nd century CE.
The poem is thought to have been written in the late 4th and/or early 5th century CE.
The work can be dated at the end of 3rd century CE.
Current opinion is that he lived in the 1st century CE.
The site has been occupied since at least the 11th century CE.