Photo from: http://www.maltacultureguide.com
Tarxien phase (3150–2500 BC)
The Tarxien phase marks the peak of the temple civilisation. This phase is named after the temple-complex at Tarxien, a couple of kilometres inland from the Grand Harbour. To it belong the last two stages in the development of the temple plan. The western temple at Ġgantija represents, along with other units in Tarxien, Ħaġar Qim and L-Imnajdra, the penultimate stage in development, that is, the introduction of a shallow niche instead of an apse at the far end of the temple. The final stage is testified in only one temple, the central unit at Tarxien, with its three symmetrical pairs of apses. The Temple culture reached its climax in this period, both in terms of the craftsmanship of pottery, as well as in sculptural decoration, both free-standing and in relief.
Photo from: http://www.maltainfoguide.com
Spiral reliefs resembling those at Tarxien once adorned the Ġgantija temples, but have faded to a level where they are only clearly recognisable in a series of drawings made by the artist Charles de Brochtorff in 1829, immediately after the temples’ excavation. The Tarxien phase is characterised by a rich variety of pottery forms and decorative techniques. Most shapes tend to be angular, with almost no handles or lugs. The clay tends to be well prepared and fired very hard, while the surface of the scratched ware is also highly polished. This scratched decoration remains standard, but it becomes more elaborate and elegant, the most popular motif being a kind of volute.
See more at: https://en.wikipedia.org