The 7 PRINCE2 principles]
The 7 PRINCE2 principles are the building blocks of the methodology. Everything else is based upon them. Inside the themes and the processes is where the principles get applied.
The principles are universal - they can be applied on all projects and in all cultures. They are self-validating - they have been proven in practice over many years to be the most effective ways of managing projects. They are also empowering - if you apply them they will give you a better chance of delivering a project successfully.