The ancient Pieniny castle was built on northern slope of a steep hill. The complex was small, due to lack of space, but placed in a spot which provided natural defence. The length of the defensive walls was 88 meters, and the walls were 1 meter thick, made from the local limestone rock. The gate was located in western part of the castle, below which cellars were built. According to Jan Długosz, during the disastrous Mongol invasion of Poland (1259), Prince Boleslaw V the Chaste fled to the Pieniny Castle (spelled as Castro Pyeniny), together with his mother and wife Kinga of Poland. Historians however doubt Długosz, claiming that construction of the castle was not initiated until the 1280s. The complex guarded southern border of Lesser Poland, and probably was abandoned by the first half of the 14th century, to be destroyed in the 15th century (most likely in 1433, during a Hussite raid.
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.