A collective of Kazan-based artists have created perfectly detailed stone mosaic portraits of football stars Lionel Messi and Mohamed Salah ahead of the World Cup. On a visit to Anna Solnechnaya's studio in Kazan on Sunday, the artist explained the inspiration behind the idea. «We made such interesting portraits with our team, art objects made of stone, in order to surprise people and show... Еще our city. We want [fans] to find something interesting to remember,» she said. The pieces — which take about two months to create — are made of almost 60kg (136.7lb) of sea pebbles. The artists believe that through the power of social media and the football stars will be able to see their own mosaic. The 2018 FIFA World Cup takes place at 12 stadiums in 11 Russian cities from June 14 to July 15.