Lefkandi (Greek: Λευκαντί) is a coastal village on the island of Euboea, Greece. Archaeological finds attest to a settlement on the promontory locally known as Xeropolis, while several associated cemeteries have been identified nearby. The settlement site is located on a promontory overlooking the Euripos, with small bays forming natural harbours east and west of the site. The cemeteries are located on the hillslopes northwest of the settlement; the plots identified so far are known as the East Cemetery, Skoubris, Palia Perivolia, Toumba, in addition to further smaller groups of burials. The site is located between the island's two main cities in antiquity, Chalkis and Eretria. Excavation here is conducted under the direction of the British School at Athens, and is ongoing as of 2007 (Previous campaigns in 1964-8, 1981-4).
Occupation at Lefkandi can be traced back to the Early Bronze Age, and continued throughout the Bronze and Iron Ages, to end at the beginning of the Archaic period (early 7th century BCE). The known cemeteries cover only part of the periods attested in the settlement, dating to the Submycenaean through Subgeometric periods (c. 1050 – 800 BCE, the "Greek Dark Ages"). The abandonment of Lefkandi coincides with a rise in settlement activity in nearby Eretria, and it has been argued by the excavators that the site is, in fact, Old Eretria.
The site's importance is due to a number of factors. First, substantial occupation strata of the Late Helladic IIIC period (c. 1200 – 1100/1075 BCE) excavated in the 1960s allowed the establishment of a ceramic sequence for this period, at that time insufficiently attested. The IIIC settlement furthermore stands in contrast to sites in the other parts of Greece, such as the Peloponnese, where many sites were abandoned at the end of LHIIIB (i.e. the end of the Mycenaean palatial period). This situation places Lefkandi within a group of sites in Central Greece with important post-palatial occupation, such as Mitrou (settlement), Kalapodi (sanctuary), and Elateia (cemetery).
The archaeological significance of the site was revealed in 1980 when a large mound was discovered to contain the remains of a man and a woman within a large structure called by some a hērōön (ἡρῷον) or "hero's grave." There is some dispute as to whether the structure was in fact a hērōön built to commemorate a hero or whether it was instead the grave of a couple who were locally important for other reasons. This monumental building, built c 950 BC, 50 meters long and 13.8 meters wide, with a wooden verandah, foreshadows the temple architecture that started to appear with regularity some two centuries later.