'Cerebellum' means little brain, yet it contains about 80% of the neurons in the entire brain. Although traditionally regarded as a primitive part of the brain and a slave to motor control, contemporary research shows that the cerebellum is involved in numerous behaviours and is a site of complex multisensory integration. Nonetheless, we know very little about how sensory information is organized in the cerebellum. This contrasts with work on the cerebrum where decades of research has laid down the principles of organization: cortical columns, modules, streams, etc. In this talk I will show how information is organized in the cerebellum. I use the pigeon vestibulocerebellum as a model. This area is involved in the processing of optic flow and is important for controlling locomotion and eye movements. By using techniques that combine neuroanatomical tracing, electrophysiologcal recording, and immunohistochemistry, I will show that the basic unit of organization in the cerebellum is a 'stripe'.