London's National Gallery is currently undergoing an £85 million renovation of its Sainsbury Wing, which includes the demolition of two criticized false columns.

The renovation aims to enhance visitor space and experience, accommodating double the expected visitor numbers compared to the 1980s.

The Sainsbury Wing was opened by Queen Elizabeth II in 1991, largely funded by John Sainsbury and his brothers.

During the renovation, a hidden letter from John Sainsbury was discovered inside a hollow concrete pillar, which expressed his strong disapproval of the architect Robert Venturi's design.

In the letter, Sainsbury criticized the inclusion of the two large false columns, stating they served no structural purpose and were a significant mistake.

The note revealed Sainsbury's delight at the decision to demolish the columns, which he referred to as 'false columns,' and expressed concern that future generations would regret their inclusion.

The refurbished Sainsbury Wing is expected to reopen in May next year, allowing visitors to form their own opinions on the architectural changes.

The discovery of the letter highlights the ongoing dialogue about architectural choices and donor sentiments in art institutions.

John Sainsbury, who passed away in 2022, was a major benefactor to the arts in the UK, and his widow expressed happiness about the rediscovery of his letter.

The Sainsbury Wing has faced criticism since its inception, including remarks from King Charles III, who described the original design as a 'carbuncle.'

The Sainsbury family remains the largest financial contributor to the renovation project, with significant donations from the Linbury and Headley Trusts.

Despite opposition from the Twentieth Century Society, the National Gallery received planning permission to proceed with the redesign and column demolition.