Xi (letter) Xi (letter) Xi (uppercase Ξ, lowercase ξ; ) is the 14th letter of the Greek alphabet. It is pronounced in Modern Greek, and generally or in English. In the system of Greek numerals, it has a value of 60. Xi was derived from the Phoenician letter samekh . Xi is not to be confused with the letter chi, which gave its form to the Latin letter X. Both in classical Ancient Greek and in Modern Greek, the letter Ξ represents the sound . In some archaic local variants of the Greek alphabet, this letter was missing. Instead, especially in the
Wikipedia logo Commons Attribution-ShareAlike 3.0 license. On September 29, 2017, the logo of Wikipedia was submerged to the bottom of Armenia’s Lake Sevan thanks to the joint efforts of Wikimedia Armenia and ArmDiving divers’ club. The logo is an unfinished globe made of puzzle pieces with symbols (including Armenian “v” letter) from different sign systems written on them. The 2m wide, 2m high logo (the largest in the world) was made in Armenia for the annual meeting of the Central and Eastern Europe Wikimedia affiliates, Wikimedia CEE Meeting that the country hosted in August 2016 in Dilijan. The (former) logo was registered