From 12,142 job-years and an annual 0.22% productivity growth, that could be the yield of the Einstein Telescope for Flanders. This is evident from a study by Econopolis commissioned by Flemish Minister-President Matthias Diependaele and POM Limburg. The conclusion is clear: The Einstein Telescope is an opportunity for Flanders that has not occurred in the past and is unlikely to present itself again in the coming decades.