Five Sthavara Lingas - Five Faces of Shiva - Five Acharyas

Panchacharyas arose out of five great Sthavaralingas located in

1. Balehonnur in Karnataka,
2. Ujjini in Karnataka,
3. Kedar in Uttaranchal,
4. Srisailam in Andhra Pradesh, and
5. Kashi or Banaras in Uttar Pradesh

under different names in different Yugas.

The five Panchacharyas are

1. Renukaradhya 
2. Dharukaas 
3. Ekoramaradhya or Ekorama 
4. Panditaradhya V
5. ishwaradhya

http://shaivam.org/virashaivam/adv_panca.htm