European Skeptics Congresses (ESCs) – a series of congresses now supported by the European Council of Skeptical Organisations (ECSO), in which skeptical organisations from many different European countries participate. They have been held ever since 1989. The conferences are often held in the month of September, and may last from two up to four days. The ECSO was formed at the 6th ESC on 25 September 1994 in Ostend, Belgium. Since its foundation, the ECSO co-ordinates in the organisation of new ESCs that take place (on average) every other year, and is hosted by a different member organisation each time. Skeptical organisations that are non-ECSO members may also send their delegations. Past ESCs are enumerated below.[1][2]