The Project Charter is a statement of the scope, objectives and participants in a project. It provides a preliminary delineation of roles and responsibilities, outlines the project objectives, identifies the main stakeholders, and defines the authority of the project manager. It serves as a reference of authority for the future of the project.

This document includes:

• Project Purpose
• Project Description
• Scope
• Objectives
• Project Requirements
• Deliverables
• Costs
• Resources

The Project Charter is subject to approval by the Project Sponsor.

You can download a template of Project Charter here

See the wikipedia Project Charter article