Apollo or the pagan deity Apollon (or fully Apollo Helios meaning Apollo of/from the sun) was the name of a place called Apollonia Acts 17:1 and also the basis for the name of Apollos (given by Apollos) Acts 18:24; 19:1; 1Cor 1:12; 3:4,5,6,22; 4:6; 16:12; Titus 3:13
As the town was named after Apollo, it finds itself in the company of numerous other locations not only within Greece, but scattered within neighbouring lands. The city that Paul visited was Apollonia (Mygdonia) in Macedon and identified by the description that it was on the road (via egnatia) between Thessalonica and Amphipolis Acts 17:1 It is one of three towns of the same name located south of Lake Bolbe and north of the Chalcidian mountains. All that remains of the city is a small mound, that has been almost untouched archeologically. A few (three?) coins have been found with the name.
His full title as Apollon Helios containing relation to the sun is reflected in further names given to Apollo, those being Helios (greek sun) Aegletes (greek light of the sun) or Phaeneus (greek bringing to light). These full titles describe Apollo as the patron god of Dephi, and as such became known as the mouth piece or oracle, and also the choir-master of celebrations as the celebrated patron god of the muse or musician. He had a son called Asclepius who was the god of healing, and as such the work of Apollo was associated with that of his son. [his name apolysis, greek to redeem or apolusis, greek to purify] He was also considered the god that could bring ill health or the plague [his name apollymi , greek to destroy]
There is no record of the establishing of an ecclesia at Apollonia. Possibly there was no perceived need as the local greeks saw the position of Apollo as the spokesman of the gods as being their champion.