Galeras Fort, locally known as Fuerte de Galeras, lies on a mountain next to the city of Cartagena. Plans to fortify this, 219 meter high, mountain date back to the 16th century. Galeras Fort however was built between the mid-18th century and 1777 by the Croatian military engineer Mateo Wodopich. It was designed by the military engineer Pedro Martín-Paredes Cermeño in the style of eclectic Neoclassicism according to the principles of the Frenchified Spanish School. It had to guard the Military Arsenal of Cartagena and was connected to the city walls. It is situated on a mountain between Atalaya Fort to the north and the Fajardo Battery to the south.
The quadrangular fort saw action during both the Peninsular War, between 1808-1814, and the Cantonal Revolution in 1873-74. In the 20th century it gradually lost its military importance but still served as a military prison.
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.