Caracalla, AE31 of Augusta Trajana, Thrace.

AVT K M AVR CEVH ANTWNEINOC, laureate head right.
AVGOVCTOC TRAIANHC, tetrastyle temple of Apollo with
statue of Apollo standing within.

Varbanov 1204 (this coin); Schoenert 371.
Note: the image in Varbanov is marked "1203" in error.