Fort Rhijnauwen was built between 1868 and 1875 as part of the New Dutch Water Defence Line. Because of its architectural style and good state of preservation, the fort is historically unique. Due it was closed to the general public for years it became a paradise for many endangered plants and animals. There are also weasels, foxes, roe, grass snakes and many varieties of butterflies. In winter, hundreds of bats hibernate in the fort. The fort consists of bombproof shelters, powder magazines, barracks, flank defences, group shelters and a large practice and parade square. Surrounding the complex is a double moat. Today, the fort can be visited on a guided tour.
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.