Mnajdra is found in an isolated position on a rugged stretch of Malta’s southern coast overlooking the isle of Fifla. It is some 500m away from Ħaġar Qim Temples. It consists of three buildings facing a common oval forecourt. The first and oldest structure dates to the Ġgantija phase (3600 – 3200 BC). The second structure to be built was the South Temple, constructed in the early Tarxien phase (3150 – 2500 BC). The Central Temple, inserted between the other two, was the last to be built. Remains to the north-east and south of these buildings indicate that these three structures are only the best preserved of a larger complex.
The South Temple has its entrance set in a concave monumental facade and leads to two rooms, or apses. On the left-hand side, a decorated porthole doorway (a square-shaped opening cut in the centre of a stone block) leads into a small chamber. The apse to the right has a small rectangular opening which connects it to a chamber within the thickness of the walls accessible only from the rear of the building and a porthole doorway at the top of a small flight of stairs leading into another small chamber. Within the latter chamber is a small niche accessed through a small porthole slab set within a trilithon. This arrangement features on the Maltese 5, 2 and 1 euro cent coins. The four horizontal courses at the top of the walls in this area are perhaps the best indication of what the building’s roof would have looked like.
Opposite the main entrance is the doorway to the second set of apses flanked by two large blocks decorated with small drilled holes. This doorway and the decorated blocks mark the position of the rising sun on the first day of spring and autumn (the Equinoxes) and the first day of summer and winter (the Solstices).
Mnajdra’s Central Temple is built on an artificial platform and has an unusual facade in that it has two doorways, a central porthole doorway and a second open doorway with a single step to its left. The first pair of rooms are built in well-finished smooth upright stone blocks supporting two horizontal courses. There is an engraving of a temple facade on a large upright next to the doorway into the inner apses. These apses hold a central covered niche and a porthole doorway in the left-hand apse, leading to a small chamber built into the thickness of the wall.
In the East Temple, the low rubble walls visible today are modern reconstructions; they follow the original plan of this structure as indicated by the torba (crushed limestone) floor which survived. The upright stone blocks in the main doorway and in the entrance to the central apse are original. Two of them retain several irregular lines of drilled holes which have been the focus of many studies and theories on their possible meaning.