The St. John’s (Jaani) church in Valga is one of the most beautiful churches in Estonia. The construction started in 1787, but it was not completed until 1816. The church represents Baroque and Classicism styles. It was built according to the design of architect Christoph Haberland and it is the only church in Estonia with an oval ground plan. The unique organ has been preserved in its original shape and it is the only instrument built by Friedrich Ladegast still left in Estonia.
Reference: Visit Estonia
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.