Helladic chronology is a relative dating system used in archaeology and art history. It complements the Minoan chronology scheme devised by Sir Arthur Evans for the categorisation of Bronze Age artefacts from the Minoan civilization within a historical framework. Whereas Minoan chronology is specific to Crete, the cultural and geographical scope of Helladic chronology is confined to mainland Greece during the same timespan (c. 3200 – c. 1050 BC). Similarly, a Cycladic chronology system is used for artifacts found in the Aegean islands. Archaeological evidence shows that civilization developed at the same time across the region, so the three schemes align chronologically. They are grouped together as "Aegean" in terms such as Aegean art and, rather more controversially, Aegean civilization.
The systems derive primarily from changes in the style of pottery, which is a benchmark for relative dating of associated artifacts such as tools and weapons. On the basis of style and technique, Evans divided his Cretan Bronze Age pottery finds into three main periods which he called Early, Middle and Late Minoan. These were sub-divided into phases and some of those into sub-phases. The Helladic and Cycladic schemes were devised later and have similar sub-divisions. Evans' system has stood the test of time remarkably well but his labels do not provide firm dates because change is never constant and some styles were retained in use much longer than others. In fact it is partly this lack of dates that has been the strength of Evans's system; several of the dates Evans believed have certainly changed, and others remain under discussion, though within fairly narrow ranges, but the scheme just adjusts for such changes. Some pottery can be dated with reasonable precision by reference to Egyptian artifacts whose dates are more certain.
