At the highest point on Poliochne hill, the nature and location of which refers to a citadel/acropolis, stands Megaron 317, which is devoid of other constructions. In its final building phase, that visible today, it is of trapezoidal plan, of internal dimensions 7.50 x 2.70-3.90 m and with the doorway on the narrow south side. The megaron opens directly, through its antechamber, onto the main street 105, the square and well 106 – that is, communal space. It has been ascertained that in the last building phase Square 106 was no longer accessible from the western –and most vulnerable– sector of the settlement.

The construction of new spaces in the west part of side street 111, between insulae V and VI, cut off access to both the square and its well. This development hints at crisis episodes within the community, as access to the interior of the settlement was restricted, and also raises questions about the actual role of Megaron 317. Although this free-standing building dominates the space with unhindered access to the square and its water source –which accounted for about half the water-supply capability of the settlement– it seems to protect itself from the rest of the land with spaces preventing access to it from the vulnerable west side – that is, the side of the hinterland outside the settlement.

However, the lack of measures to secure even rudimentary privacy perhaps belies the public character of the building. Found inside it were the skeletons of two adults, the position of which indicates that they were trapped there at the time of the great earthquake and, unable to escape, were crushed by falling stones. 

Megaron 317 is a special case of building at Poliochne for reasons further to its dominant position. 

1. It is the unique case of the free megaron type. All the other buildings at Poliochne, throughout the third millennium BC, had additional spaces annexed to the megaron. 

2. The building was founded in this position already from the Green building phase at Poliochne (EBA ΙΙ) and was reconstructed at least five times during the subsequent periods, on the same site, with the same orientation and with only minor deviations in size and shifted each time southwards. 

3. Its construction, rough and robust, is impressive, setting it off from the rest of the buildings at Poliochne. Its walls are strong and include large monolithic slabs of local sandstone (up to 1.80 m long in one instance), as well as pebbles. In the lower part, upright slabs revet the outer face of its east wall, as orthostats, the unique example at Poliochne. 

The older hypothesis that the building functioned as a temple is not supported by the finds, as it yielded not one object or construction of symbolic or even non-domestic character, or by the Early Bronze Age parallels in the wider region.