The Countess of Arundel's share of the Shrewsbury inheritance enabled her to buy the site and extend or rebuild Tart Hall in 1638 as a pleasure house and laboratory, with its appearance based on an Italian
casino (that is, a villa or summerhouse). She took advice on the construction from
George Gage and employed the master mason
Nicholas Stone, and the building appears to have been influenced by
Serlio and the villas of north Italy. The Countess of Arundel collected paintings and drawings, and did scientific experiments in the hall's "Pranketing Room". She also collected medical and culinary texts and recipes which were published in her book
Natura Exenterata: or Nature Unbowelled By the most Exquisite Anatomizers of Her. The artist
Wenceslaus Hollar became acquainted with the Arundels in Venice in 1636, and joined their retinue, marrying one of their servants. The newly married couple lived at Tart House while in London: their first child was born there in April 1643, and later that year Hollar engraved the hall in the background of a print
Spring, the first in a series of the allegorical
four seasons. The background features in the other three prints are also connected with the Arundels, with a view from Tart Hall across
St James's Park to the
Banqueting House in
Summer, the grotto at Aldbury in
Autumn, and the
Royal Exchange in
Winter. From the evidence, Tart Hall appears to have been a three-story building with
Dutch gables and attic, with large glazed windows at the front, and two
loggia wings extending into the garden at the rear. The contents of the house were included in an inventory made in 1641, which was published by
Lionel Cust in the
Burlington Magazine in 1912. The inventory includes the subjects of her paintings and names for several rooms, included the "Diana Room" which featured a painting of
Diana and Actaeon optimistically attributed to Titian, and the
Fall of Phaeton was painted on the ceiling. ==After the countess==