Unique Property: An 18th-Century Octagonal Tea House in The Netherlands
Hidden among ancient trees on the edge of the historic Backershagen estate in Wassenaar, an octagonal tower rises, as if lifted from the pages of a storybook. Known locally as The Mysterious Dome, this former 18th-century tea house has captivated visitors for generations.
In 1918, writer C. Joh. Kieviet (known in the Netherlands for his beloved Dik Trom series) found inspiration here for his children’s book The Mysterious Dome. The title still fits. There is something quietly theatrical about this place: part romantic folly, part architectural curiosity, and entirely enchanting.
Commissioned in 1732 by Cornelis Backer and his wife Clara van der Hagen, the dome formed part of their grand Backershagen estate. From the street, its slender silhouette still peeks through the trees, a tranquil landmark in a landscape shaped by centuries of privilege and retreat.
Today, that once-simple tea pavilion overlooking open fields has evolved into a lovingly restored and surprisingly complete residence, where heritage and contemporary comfort exist in perfect balance.
The approach feels ceremonial. The dome stands atop an artificial hill approximately fifteen meters high, reached via a sturdy staircase of wooden sleepers winding through greenery. With every step, the world below falls away.
The structure itself is octagonal (about 5.5 meters in diameter) spread over two full floors and crowned by a roof terrace lookout. Alternating wide and narrow façades create a rhythmic exterior.
The lower level is plastered brick; the upper level is timber. Above, a zinc-covered dome glints softly through the leaves, crowned by a wooden balustrade recalling its original function as a viewing pavilion.
Over the past decade, the property has undergone a meticulous restoration. Original materials were preserved wherever possible, while discreet modern upgrades, including Fineo vacuum glass installed in 2024, ensure insulation and comfort worthy of contemporary living.
The surrounding park has also been revitalized with the support of the municipality, offering walking paths and open green space, while the hilltop position guarantees privacy.
The entrance opens into a practical yet refined sequence: cloakroom, toilet, and utility room. Beyond lies the central living space, nearly four meters high, where history meets tailored design.
A custom-built bookcase wraps the walls. A dining table with fixed bench seating anchors the room. The original tiled floor, now enhanced with underfloor heating, adds tactile authenticity.
In a discreet alcove, a compact yet high-quality kitchen sits, cleverly concealed when not in use yet fully equipped for modern cooking. In one corner, a cozy coffee nook proves that small spaces can still feel grand.
Halfway between floors, a mezzanine level reveals a boutique-style bathroom: bathtub, rain shower, washbasin, and toilet, finished in warm, tranquil tones reminiscent of a refined hotel suite.
At the top of the monumental staircase lies the true heart of the home: the octagonal Dome Room.
Eight tall windows frame panoramic views of treetops that shift color with the seasons. Original 18th-century wall paneling and painted surfaces remain intact, giving the space a palpable sense of time.
The staircase entrance is nearly invisible, concealed behind wooden wall panels. In the 18th century, Cornelis Backer delighted in staging playful disappearing acts for his guests. After ushering them inside, he would close the floor hatch and conceal the staircase behind a panel that resembled a cupboard.
With impeccable timing, he’d swing open the grand double doors to the loggia, revealing sweeping views. When guests later attempted to leave, the staircase seemed to have vanished.
The top floor has been transformed into an intimate bedroom suite. Built-in wardrobes maximize space; a washbasin and toilet enhance convenience. A bespoke furniture piece subtly incorporates a hidden TV lift, maintaining visual calm.
Above, a wooden stair leads to a bright mezzanine beneath the roof, ideal as a studio, reading loft, or workspace.
From the mezzanine, a door opens to the roof terrace: sheltered yet expansive, high above the park.
Once, views stretched from the dunes near Noordwijk to the towers of The Hague. Today, mature treetops soften the panorama in summer. Yet the sensation of height and seclusion remains extraordinary.
At the base of the hill lies an intimate, classically designed garden of approximately 133 m², arranged with several seating areas. Beyond, the national monument parkland provides a natural backdrop.
This unique property is listed for sale at Redres de Bouwkunstmakelaar.