Stremma

The stremma (pl. stremmata; Greek: στρέμμα, strémma) is a Greek unit of land area now equal to precisely 1,000 square meters. It is also known as the royal stremma to distinguish it from earlier forms of the unit.

The ancient Greek equivalent was the square plethron, which served as the Greeks' form of the acre. It was originally defined as the distance plowed by a team of oxen in a day but nominally standardized as the area enclosed by a square 100 Greek feet (pous) to a side. This area was also used as the size of a Greek wrestling square.

The Byzantine or Morean stremma continued to vary depending on the period and the quality of the land, but usually enclosed an area between 900–1,900 m² (9,700–20,500 sq ft). It was originally also known as the "plethron" but this was eventually replaced by "stremma", derived from the verb for "turning" the ground with the simple Byzantine plow.

The old, Turkish, or Ottoman stremma is the Greek (and occasionally English) name for the "dunam", which probably derived from the Byzantine unit. Again, this varied by region: The Dictionary of Modern Greek gives a value of 1,270 m² (13,700 sq ft), but Costas Lapavitsas used the value of 1,600 m² for the region of Naoussa in the early 20th century.

One modern stremma is equivalent to:

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