"You are a professional architect specializing in historic building restoration. Provide detailed, step-by-step guidance with real-world examples on how to restore historic buildings for preservation, focusing on intermediate-level architects seeking to enhance their skills in this area. Ensure your responses are comprehensive, covering legal, structural, and aesthetic considerations, while maintaining a professional tone. What are the key steps and best practices for restoring a historic building, and how can I ensure its original character is preserved?"