In the cove Sepen, just a few kilometres by air to the south of Omišalj, there is an inexhaustible site of archaeological heritage. The first traces of settling in the area date back into the 1st century when the Roman town Fulfinum emerged. Its emergence is related to the construction of the city for the retired Roman soldiers during the Flavian dynasty. A good geographical position caused the development of seafaring and trade. The past archaeological research discovered the city forum, the heart of every city from the Roman age, the centre of the social and religious life of the Romans. Here, only fifty meters from the sea, is where the foundations of the temple, the civilian basilica and the commercial edifices (tabernae) were found. In one moment during the 3rd century, the city simply died out, at least when it comes to its original monumental form. Still, life continued. Traces of more modest settlement of the area were found, probably connected with the port which is still in function.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.