A pattern language

This book, written by Christopher Alexander and his colleagues, introduces the concept of a 'pattern language' consisting of 253 patterns that address various design problems in architecture, urban planning, and community design.

Each pattern describes a recurring problem and its solution, allowing readers to adapt these solutions to their specific needs and local conditions.

The book is structured to help ordinary people, as well as professionals, design and improve their homes, streets, and communities.

It has had significant influence on fields beyond architecture, including software engineering and urban planning.