Cosmic-ray muons, continuosly reaching the Earth soil with an almost constant and well known rate, are exploited as tool to probe the interior of large scale objects up to the kilometer scale. Muon radiography is reaching promising results in several applications where other thecniques are not suitable. The International workshop on muography is a conference series, intended as an opportunity to share the knowledge and the most recent progresses within the muon radiography community and other interested scientists.