On Monday, a museum spokesperson revealed that a leak compromised between 300 and 400 books, ranging from the late 19th to early 20th centuries. This incident occurred on November 26.

The leakage was triggered when a valve, part of an obsolete plumbing system, was mistakenly activated. This system, which had been decommissioned several months ago, is planned to be replaced during renovation efforts set to begin in September 2026, the spokesperson explained.

These texts focus on Egyptology and scientific documentation. Though frequently used by visitors, they are not unique copies, the spokesperson noted.

Once properly dried and repaired, the books are expected to be returned to their places on the shelves, the spokesperson assured.

While officials are optimistic that the collection won’t suffer any lasting damage, this leak adds to the growing concerns following the October 19 theft, which exposed significant security lapses at the Louvre.

Thieves raided the Apollo Gallery on the museum’s upper floor using a truck-mounted ladder to gain access through a window.

They broke into two display cases and made off with nine items, including a diamond and sapphire jewelry set worn by Queen Marie-Amélie and Queen Hortense.

In just seven minutes, the thieves had made off with loot with a value estimated at more than $US100 million ($150 million), leading to widespread consternation about inadequate security measures.

Officials have also acknowledged “structural issues facing the museum,” which was built from the late 12th century onward and received 8.7 million visitors last year.

In November, the museum announced it would increase ticket prices to fund a modernisation program.

From January 14, 2026, an individual ticket for visitors from outside the European Economic Area (EEA) — a grouping of nations that comprises the European Union member states plus Iceland, Liechtenstein and Norway — will cost €32 ($56), a 45 per cent increase on current prices.

This is expected to bring in an extra €15-20 million ($26-35 million) a year, which will be invested in infrastructure upgrades.