Original designs for Blenheim Palace have emerged, revealing plans for a Roman-style bathing complex that was never constructed.

The proposal, drawn up in 1705 by architect Sir John Vanbrugh, was intended for the site where the Orangery now stands at the Oxfordshire residence.

Vanbrugh’s early 18th-century drawings indicate that the area near the Flagstaff Gate was conceived as a thermae bathing facility for the Duke of Marlborough, though the scheme was abandoned because of the enormous construction costs.

The records were found by archivists collaborating with Blenheim’s Built Heritage team.

Kelly O’Driscoll, who leads the built heritage section at Blenheim Palace, explained that during essential restoration efforts, the team had been carefully examining the Palace’s historical papers and was delighted to discover these plans.

She noted that the Baroque style first developed in Rome, and Baroque architects and patrons frequently drew inspiration from the grandeur of ancient Rome, so it made sense that the Duke and Vanbrugh would have contemplated a Roman bathing establishment.

She added that the costs involved in installing the required heating and plumbing systems proved too steep even for someone of the Duke of Marlborough’s considerable means.

She pointed out, however, that the estate does possess the impressive Orangery, which continues to attract thousands of guests each year.

The work of Sir John Vanbrugh is currently being celebrated at Blenheim Palace through the Blueprints of Power exhibition, held as part of the nationwide Vanbrugh300 programme.

The showcase, which runs through May 31, offers visitors an interactive exploration of Vanbrugh’s professional life and accomplishments.

More details and tickets can be found at www.blenheimpalace.com/whats-on/events/blueprints-of-power.html.