Bjørnkær is a 14th century castle mound consisting of two square castle embankments surrounded by a moat and an outer embankment. During excavations in the 1930s, the foundations of a small building were found on the eastern castle embankment. Inside, the building measures about 4.5 m x 6.5 m, and the remains of the entrance door can be seen in the west wall. The other walls have traces of windows. The remains of cobblestones were found outside the building. Bjørnkær was owned by nobleman Niels Kalf. His widow, Abel Puder, gave the castle to the Bishop of Århus in 1427.
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.