The Tower of the Winds is one of the most renowned landmarks of Plaka and one of the best preserved monuments in the whole city. It was also known as Horologion of Andronicos, named after the Syrian architect and astronomer Andronicos Kyrrestes from Kyrrhos, who was responsible for its construction. It is a relatively small octagonal building considered to be part of the Roman Agora, with an elaborate waterclock on the inside. On top of its conical roof there was a bronze Triton vane that indicated the direction the wind was blowing from by pointing his wand at one of the eight winds depicted on the upper part of each of the eight sides. The winds are relief representations of male figures, each with the appropriate attributes. Their names are engraved under the corresponding part of the octagonal eave: Boreas (North), Skiron (North West), Zephyrus (West), Lips (South West), Notos (South), Euros (South East), Apeliotes (East) and Kaikias (North East). Each corner of the tower also sports a sundial, an iron bar that sheds its shadow on specially engraved lines. On a day without sun one can still keep track of time thanks to the hydraulic invention of Andronicos. The Roman architect Vitruvius mentions the monument as Tower of the Winds. It is preserved in excellent condition, mainly because during the Turkish domination it was turned into a Tekke, i.e. a dervish chapel.