The course has being held at X University from summer semester 2013 to summer semester 2014. Please see comments below.
Courses are taught or given or offered. They are not "held". A class can be held. And yes, since they are taught or given or offered, the verbs would be in the passive tense. A French course is offered [by the university] ever year. The passive is used and the agent [by x] is often assumed, not stated.
Past continuous passive tense
1) : The course was being given or taught at X University in the summer of 2013 WHEN the earthquake occurred.
One ongoing action is described when another action occurs.
Compare that to the present continuous passive tense:
2) The course is being given this summer semester on the main campus.
The time of the action is in the near future or present time.
3) The course is given every summer on the main campus.
The action is a general idea.
General ideas are given in the present tense, passive or active voice. He drives fast cars. She is reading by candlelight.
If two dates are given, continuous tenses are not appropriate.
The course was taught in the summer of 2013 and 2014.
From the summer of 2013 to 2014 may only be used for uninterrupted action:
I was learning English from the summer of 2013 to the summer of 2014.