This major milestone signals the end of an era for the Lab. Building 54, Perseverance Hall, and the patio area in front of the building served as the hub for Lab activity since it opened in 1950. Below is a selection of images from the Lab archives showing the many festivals, retirement parties, poster sessions, open houses, and great conversations hosted in Building 54 over the years, as well as renderings of what the future holds for the site.

The demolition of Building 54 also marks a huge step forward in the Seismic Safety and Modernization new facility project. The new facility will be a thoughtful, flexible replacement facility to meet the Lab’s future needs. It will serve as a new front door for the Laboratory, improving the day-to-day experience of our Lab community, and our visitors.

B54 demolished August 2023


  • Miles Green says:

    Wow, this is amazing. Thanks for the sneak peek of the demolition project. Many good times were had at the old cafeteria building 54. Can’t wait to see what comes next!

  • John Parr says:

    Thaks for sharing the pics and timeline. It is exciting to see this project come to fruition!

  • Laurel says:

    What a powerful photo essay. Thank you for this story honoring the Cafeteria, our culture, and B54 history

  • Lisa Ehlers says:

    It was exciting to watch the demolition of the old building and I can’t wait to start construction on the new facility, which will be the heart of the Lab.

  • Laura B. Crosby says:

    The cafeteria’s demolition website you created is wonderful, thank you! It’s sad to watch the old building fall since we celebrated so much there. Knowing we will have a fantastic new structure for the benefit of the entire Lab is quite thrilling!!