The Honourable Society of Lincoln's Inn is one of the four Inns of Court in London to which barristers of England and Wales belong and where they are called to the Bar. It is located in Holborn, London, and is the largest Inn, covering 11 acres. The Inn is a professional association for barristers in England and Wales and provides various services to its members, including training, library facilities, and accommodation.

Lincoln's Inn has a rich history dating back to at least 1422, and it has played a significant role in the legal profession in the UK. The Inn is known for its beautiful architecture, including the Great Hall and the Chapel, which are notable landmarks in London.

Regarding sustainability, there is limited publicly available information on specific initiatives or certifications that Lincoln's Inn may have undertaken. However, like many historic institutions, it may face challenges in balancing preservation with modern sustainability practices. Further details on their sustainability efforts would require direct inquiry or access to specific reports or statements from the Inn.