The EEMC 20-23 Companion includes a presentation of the public and private archives and foundations, based in Europe that contributed to the EEMC activities through giving information and providing electoral material from the various European elections held since 1979. The hope is that it constitutes a useful collection for researchers, students and scholars interested in a particular type of visual documentation that is often not considered worthy of preservation. The book is also a public acknowledgement of the existence and important work done by the archives that contributed to our research.