Event Storming is a collaborative workshop technique invented by Alberto Brandolini in 2013 for rapidly exploring complex business domains through visual modeling with sticky notes. Rooted in Domain-Driven Design (DDD), it brings together domain experts, developers, and stakeholders in a highly interactive session to discover domain events, processes, and system boundaries. The technique's power lies not just in the model created, but in the shared understanding gained when diverse perspectives converge on a single timeline. A key principle: use an unlimited modeling surface (long paper rolls on walls) to avoid the artificial constraints of whiteboards — spatial freedom enables deeper exploration and prevents premature simplification of complex domains.