Cryostats are a fundamental building block of cryogenic systems and successful design and construction of these devices is vital for project success. This half day course covers some of the most important aspects of cryostat design. It illustrates these aspects via examples of real-world cryostats including those from ESS, ILC, LHC and laboratory cryostats. Best practices and references for additional are provided. Topics covered include: Definition of Requirements, Cryostat Materials, Thermal Insulation, Structural Design, Safety Considerations, and Instrumentation.