This meeting aims at bringing together theoreticians and observational astronomers to review our progress on finding, studying and understanding galaxy clusters in the early Universe.

Sessions devoted to the following topics are anticipated:

• The theorists' Universe: What do models and simulations predict about the population of galaxy clusters at high redshifts?
   
• Finding galaxy clusters at high redshifts: Multi-wavelength searches (optical, infrared, x-ray, S-Z effect, etc.)
   
• What we have learned so far: Properties of high-redshift clusters and their galaxy members; constraints on cosmology
   
• Evolution of clusters over a Hubble time: The connection between to low- and high-redshift clusters
   
• The future: new search methods and surveys, etc.