The Slav Epic (Slovanská epopej) is a series of twenty monumental canvases (the largest measuring over 6 by 8 metres) depicting the history of the Slav people and civilisation. Mucha conceived it as a monument for all the Slavonic peoples and he devoted the latter half of his artistic career to the realisation of this work.
The idea of the work was formed in 1899, while Mucha was working on the design for the interior of the Pavilion of Bosnia-Herzegovina, which had been commissioned by the Austro-Hungarian government for the Paris Exhibition of 1900. In preparation for the assignment he travelled widely through the Balkans, researching their history and customs as well as observing the lives of the Southern Slavs in the regions that had been annexed by Austria-Hungary two decades earlier. From this experience sprang the inspiration for a new project - the creation of 'an epic for all the Slavonic peoples' that would portray the 'joys and sorrows' of his own nation and those of all the other Slavs.