Summer Esperanto Study (in , shortly "SES") is the largest yearly international meeting for learning the Esperanto language. There is teaching of Esperanto on all levels, talks, short teaching of other languages, workshops, concerts, travel etc. Many participants use also "lernu!", the official website for free learning of Esperanto. The coordinator of the event is the non-profit organization E@I, since 2007. The minister of education and the mayor of the city usually support the event. The 7th Summer Esperanto Study was on 12–20 July 2013 in the city of Martin in Slovakia. There were 230 people from 27 countries.