From In Custodia Legis:
On Friday, June 28, 2019, the Law Library held a ribbon-cutting ceremony to open a new secure storage facility that will be home for much of the Law Library’s rare book collection. The Law Library currently stores some of its rare collection in a smaller vault as well as storing some of its rare materials in space borrowed from other divisions at the Library of Congress. Consolidating the collection improves collection security and access.
The secure storage facility differs from our existing vault in a few important ways: it has over 9,000 linear feet of shelving; it has modern compact shelving; and it has state-of-the-art cooling, humidification, fire retardation and security systems.
This new storage facility has about 4 times more shelf space than the existing vault contains.