The Balluderon Stone, otherwise known as Martin's Stone is a class II Pictish cross slab in situ at Balluderon, Angus.
A slab of Old Red Sandstone, the cross slab is situated in a field and protected by iron fencing. The slab, of which only the lower half remains, bears the remnants of a Celtic cross, two mounted riders, a serpent and z-rod symbol and a Pictish beast design. Local tradition associates the slab with the Legend of the Nine Maidens who were devoured by a dragon which was subsequently slain by a hero named Martin. Folk etymology names this as the origin of Strathmartine, the valley in which the slab stands.
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.