Count Ernst Johann von Biron bought the Rundāle manor complex on 26 June 1735. In August of the same year the court architect of Russia Francesco Rastrelli came to Courland. From September until December agreements were being concluded with carpenters, masons, brickmakers, construction material suppliers, potters – stove makers.
The construction project was ready in January of 1736. The eight pages of the project are located in the graphic art collection “Albertina” in Vienna. It consists of a situation plan, two floor plans, a sketch of four facades and the altar of the palace church.
The first construction period from 1736 to 1740.
On 24 May 1736 the foundation-stone of the palace was set. Construction of the foundation was completed on 6 July, whereas on 13 October the central building was built to the level of the windowsill of the second floor. The construction of 12 brick-kilns and 12 brick storages was finished in June. 268 masons were working in the palace, but Rastrelli requested 500 men. Construction was stopped on 1 November due to cold.
The construction works were restarted on 12 April 1737. On 28 May the central building was finished, and on 18 June covering was started to be placed on the side buildings, whereas the construction of the central building roof was finished at the end of June. When the works were stopped on 10 October, one side building was roofed over, and the other one was covered with a temporary roof. The foundations of the stables were also ready. The bricklaying works were finished on 1 October 1737. After Biron was elected Duke, he ordered to simplify the building. The finishing materials were produced by the master carpenters and woodcarver A. Kamaev of the Imperial Construction Bureau of Saint Petersburg, master potter I. Ushakov of the Neva brick factory with his team and painters I. Mizinov, I. Pilugin and I. Yevdokimov. Austrian potters were working in Vircava. The finishing materials were also being produced in Saint Petersburg.
In 1738 the volume of work in Rundāle decreased, as construction works of Jelgava Palace began. Some of the produced components were also taken to Jelgava. However, the works were moving forward – chimneys and room arches were being built, roofs were being finished. From 14 June, when the construction of the main residence in Jelgava began, the construction works in Rundāle were moving at a slower pace. Master carpenter Eger had finished oak-wood panels for 33 rooms, as well as 13 oak-wood parquet floors. Ceilings boards were put up in the rooms, so that the plastering works could be started. In September the carpenters started working on the outside staircases. The construction of the gate tower was also started.
In 1739 the interior plastering works were supposed to be carried out, but the Duke ordered to decrease the amount of plasterers and to simplify the work. Stucco formations were made only for the main staircase rooms and halls, the other rooms were left with smooth ceilings. Only ten craftsmen were working in Rundāle. On 1 February after the order of Empress of Russia Anna Ioannovna all of the Saint Petersburg Construction Office masons were sent to Courland. The components made for Rundāle, including carved doors, panels, parquet, Austrian potter stoves, plafonds painted on canvas and cast-iron facade decorations made by Bartolomeo Tarsia that can be seen in the Jelagava Palace facade, were transported to the main residence in Jelgava. N. Vasilyev assisted Rastrelli in managing the construction works. Russian chamberlain Ernst Johann von Buttlar was in charge of finances and organisation and he was sending reports to Saint Petersburg regarding the work process.
In 1740 the woodcut altar of the palace church was transported to Jelgava. Supposedly the room decoration in the palace had been finished, but not all of the wall panels had been mounted and some of the stoves were also not set up, as a lot of the materials were in storage.
Work was stopped after the palace revolution of 20 November in Russia and the arrest and exile of Duke Ernst Johann. The prepared finishing materials and construction components were sent to Saint Petersburg, and some of the built-in components, such as doors, wall panels and parquet, were broken.
Overall more than a thousand different profession craftsmen and workers were employed in the construction works of the palace.
The second construction period from 1764 to 1770.
In 1762 Ernst Johann von Biron was granted mercy and returned to Courland in January of 1763.
In January of 1764 Johann Gottfried Seidel was appointed the court architect of the Duke, but in August Francesco Rastrelli returned to work for the Duke and was appointed to the position of main administrator of the Duke’s buildings. During this time he arranged his construction designs and carried out general supervision of the Duke’s construction works.
The unfinished gate tower was torn down and the stable building construction was started. Latvian carpenters and woodworkers were sent from the Duke’s domain manors to Rundāle up until 1768. In 1765 woodworker Blanks, sculptor Zībenbrods, locksmith Šreibfogels, gold plating master Johans Endress, potter Šēfers, locksmith Horstmanis and coppersmith Mēmels were working in the palace.
In 1766 Severin Jensen from Denmark started working as the court architect. His style can be seen in the gateposts and in the stable buildings, which obtained a semicircular shape in contrast to Rastrelli’s rectangular design. A dating – 16 May 1766 – has been made in the keystone of the northern facade window.
In 1768 the gate was built and the forgings were placed.
The palace interior planning was changed slightly. By merging five smaller rooms the grand dining-room – the Grand Gallery – was created, whereas a dance hall known as the White Hall was created in the place of the palace church. Both front staircases, the Small Gallery, the lobby and galleries of the first floor were preserved from the original interiors of the first construction period.
The stucco decorative finishing of the interiors was carried out by the Berlin sculptor and stucco marble master Johann Michael Graff together with his team – his brother Josef and assistants Bauman and Lanz – from 1765 to 1768. Sculpturesque decorations were made in twenty-seven rooms, but in two rooms of the Duke’s apartments and in the hall – synthetic marble panels. Works were started in the central building first. The Marble Hall and the marble panel of the Gold Hall in which the dating has been engraved on the door lining, were finished in 1767. In July of 1768 Graff received payment for his final works – the White Hall, Oval Cabinet, Duchess’ Boudoir and vases for the 22 stair banisters.
The ceilings were painted by the Italian painters Francesco Martini and Carlo Zucchi from Saint Petersburg. They started working in August of 1766, but only the name of Martini is mentioned in documents starting with March of 1768. Francesco Martini received his last payment in March of 1769. Ceilings of eight rooms, as well as the walls of two rooms were painted. One of the ceiling paintings got destroyed. The repainted wall paintings were later uncovered in the Grand Gallery and in the second study of the Duke.
The Duke came to Rundāle Palace in April of 1767 and stayed there until December with interruptions, although the finishing works were still in progress. The palace was also inhabited in 1768. The final works were carried out in 1770 when a fellow of J. M. Graff placed mirrors in the White Hall.