Tower of the Winds of 2014, the Athens Ephorate of Antiquities began cleaning and conserving the structure; restoration work was completed in August 2016. The 12-metre-tall structure has a diameter of about 8 metres and was topped in antiquity by a weathervane-like Triton that indicated the wind direction. Below the frieze depicting the eight wind deities—Boreas (N), Kaikias (NE), Eurus (E), Apeliotes (SE), Notus (S), Lips (SW), Zephyrus (W), and Skiron (NW)—there are eight sundials. In its interior, there was a water clock (or clepsydra), driven by water coming down from the Acropolis. Recent research has shown that the considerable height of the tower
HMS Boreas (1757) of action." Further, the sides of the vessel above the level of the deck were too low, leaving the crew exposed to enemy fire should "Boreas" run alongside an opposing ship. Boyle's concerns went unheeded, and "Boreas" was put to sea in early 1758. In April she assisted in the capture of the 36-gun French frigate "Diane". Boyle then sailed her to America on 21 June 1758 and she was subsequently involved in the operations off Louisbourg that year. "Boreas" shared in the proceeds of the capture of the merchantman "Foudroyant" and the schooner "Two Brothers", captured off Louisbourg. She