In 1719, the old Renaissance castle from the late 16th century was demolished.
The newly appointed Privy Councillor Magnus Julius De la Gardie, who was in possession of a great fortune through his marriage to Hedvig Catharina Lillie, commissioned architect Joseph Gabriel Destain to design the present palace, built between 1720 and 1727.
The courtyard is open to the sea and took on its present appearance in the 1820s.
It is modelled on the garden of Logården at the Royal Palace in Stockholm.

In 1772, Tullgarn was acquired by the crown and became a royal residence.
Occupancy was granted to Duke Fredrik Adolf, youngest brother of King Gustav III.
Between 1778 and 1793, Frederick Adolf resided there with his lover Sophie Hagman, and many episodes from this period are preserved as the Tullgarnsmminnena, The Tullgarn memories.
Frederick Adolf modernized the palace in neo classical style, adding another storey to the wings, giving the palace a flat Italian-style roof.
Fredrik Adolf's interiors are some of the finest examples of Gustavian style in Sweden.
Among the designers involved were Louis Masreliez, Jean Baptiste Masreliez, Per Ljung and Ernst Philip Thoman.
Many of the interiors created at that time remain today in their original form.

After the death of Frederick Adolf, it was granted to his sister, Princess Sophia Albertina, who spent all her summers her until her death in 1829.
The following year, it was granted to the heir to the throne, the future Oscar I of Sweden, and served as the summer residence of the Swedish royal court during his reign.

King Gustaf V (then Crown Prince) took over Tullgarn in 1881 and together with his consort Victoria, implemented extensive changes.
The main building was decorated more like a modern functional summer home then a royal pleasure palace.
Much of the present interior dates from the time of King Gustav V and Queen Viktoria, including the vestibule, whose walls are covered in hand-painted Dutch tiles.
The breakfast room is furnished like a south German Bierstube, possibly reflecting the fact that Queen Viktoria came from Baden in Southern Germany.
The royal couple used the palace as their summer residence.
In 1924, Ethiopian Crown Prince Ras Tafari (later Emperor Haile Selassie) stayed at Tullgarn while touring Europe.
In 1719, the old Renaissance castle from the late 16th century was demolished. The newly appointed Privy Councillor Magnus Julius De la Gardie, who was in possession of a great fortune through his marriage to Hedvig Catharina Lillie, commissioned architect Joseph Gabriel Destain to design the present palace, built between 1720 and 1727. The courtyard is open to the sea and took on its present appearance in the 1820s. It is modelled on the garden of Logården at the Royal Palace in Stockholm.
In 1772, Tullgarn was acquired by the crown and became a royal residence. Occupancy was granted to Duke Fredrik Adolf, youngest brother of King Gustav III. Between 1778 and 1793, Frederick Adolf resided there with his lover Sophie Hagman, and many episodes from this period are preserved as the Tullgarnsmminnena, The Tullgarn memories. Frederick Adolf modernized the palace in neo classical style, adding another storey to the wings, giving the palace a flat Italian-style roof. Fredrik Adolf's interiors are some of the finest examples of Gustavian style in Sweden. Among the designers involved were Louis Masreliez, Jean Baptiste Masreliez, Per Ljung and Ernst Philip Thoman. Many of the interiors created at that time remain today in their original form.
After the death of Frederick Adolf, it was granted to his sister, Princess Sophia Albertina, who spent all her summers her until her death in 1829. The following year, it was granted to the heir to the throne, the future Oscar I of Sweden, and served as the summer residence of the Swedish royal court during his reign. 
King Gustaf V (then Crown Prince) took over Tullgarn in 1881 and together with his consort Victoria, implemented extensive changes. The main building was decorated more like a modern functional summer home then a royal pleasure palace. Much of the present interior dates from the time of King Gustav V and Queen Viktoria, including the vestibule, whose walls are covered in hand-painted Dutch tiles. The breakfast room is furnished like a south German Bierstube, possibly reflecting the fact that Queen Viktoria came from Baden in Southern Germany. The royal couple used the palace as their summer residence. In 1924, Ethiopian Crown Prince Ras Tafari (later Emperor Haile Selassie) stayed at Tullgarn while touring Europe.
Tullgarn Palace