Set in the Val di Noto, a region celebrated for its UNESCO-listed Baroque towns, the property was commissioned as a summer residence by two noble families in the late 1800s. It features grand reception rooms, shaded loggias, a panoramic tower and former stables converted into guest accommodation.

Located in the Dordogne near Mareuil-en-Périgord, this château has nearly 9,700 sq ft of interiors stripped back and ready for a complete restoration.

Restored in the 1970s, Castello Avogadro Spada became a cultural salon that hosted Italian industrialists, royalty, and contemporary artists such as Cy Twombly, Christo, Alberto Burri and Michelangelo Pistoletto.

The Louises overlooks Lion Rock and the Tasman Sea, surrounded by native bush and subtropical gardens and set across 7 acres above Piha’s black-sand coast. One of New Zealand’s best-known surf destinations, Piha feels remote and raw, but sits less than an hour from central Auckland.

An 18th-century Baroque palace in Portugal’s Bairrada region is listed for €8 million after more than 250 years in one family. The furnished estate includes artwork, a library, a private chapel and equestrian facilities.

Set in Varese, a northern Italian city known for its historic villas and gardens, Villa Il Nonaro stands within 11 acres of private parkland near Milan and the Swiss border.

Inside Voltaire’s former Paris apartment on Quai Voltaire, where the Enlightenment philosopher spent the final months of his life, received Benjamin Franklin and died in 1778.

Just 15 miles from central London, Ripley Grange looks as though it has stood beside Epping Forest for centuries. In fact, the Tudor-style country house was built between 1928 and 1930 for industrialist Charles Frederick Clark, whose fortune came from carbon paper and typewriter ribbons.

Built at the turn of the 20th century for James E. Nichols and designed by C.P.H. Gilbert, 4 East 79th Street has lived several lives: private Gilded Age mansion, crime scene, diplomatic address, subdivided residence, and ultimately a painstakingly reconstructed single-family home.

Designed by Horace Trumbauer, whose work includes the Philadelphia Museum of Art, the Gilded Age mansion retains a four-story Carrara marble staircase, Samuel Yellin ironwork, and original Louis XV-style salon rooms across more than 10,000 ft² / 929 m².