The Sinebrychoffs decorated the rooms of their home in different period styles. The largest of the rooms was decorated in the Empire style, the drawing room next door in the Gustavian style; Paul Sinebrychoff’s study and the dining room represent Dutch Baroque.
The Empire room is still the finest room in the building, with the most valuable furniture and chandeliers. It is likely that the furniture was already acquired by Paul’s father, Paul Sinebrychoff the Elder around the 1850s. It is believed that they were bought from the emperor’s court, from the Rophsha palace in Russia. The decorative mahogany set consists of two sofas, chairs, tables and pedestals. The furniture is upholstered in yellow silk, a material favoured in the Empire style.
The rose-coloured set of the Gustavian room consists of armchairs, sofas, chairs, stools and a table. The chairs and sofas upholstered in silk were made in the 18th century, the table in the 19th century. The set was gilded at the end of the 19th century. One of the chairs bears the signature of Jacob Malmstein, a master from Stockholm. Paul Sinebrychoff purchased the set with 3,030 Swedish Krona.
The most valuable piece of furniture is the mahogany, intarsia-decorated secretary desk that originally belonged to Sofia Albertina, sister of Gustav III. It was designed by Louis Masreliez and made by the court joiner Gustaf Adolph Ditzinger. The desk represents the later phase of the Gustavian period that reached its peak in Masreliez’s interior designs in the first half of the 1790s.
The decorative parquet floor of the Gustavian Room is original and comes from an 18th century Swedish palace. The parquet was badly damaged by bombing during the Winter War; it was rebuilt and is now smaller than the original.
The study of Paul Sinebrychoff with its leather sofas and sturdy cabinets represents the Dutch Baroque style. The cabinets in the room are from around 17th century.
The dining room with its cabinets, Delft and China porcelain, candle-holders and barley-twist chairs is decorated in the Dutch Baroque style. Paul Sinebrychoff bought the Neo-Baroque dining set of the dining room from Stockholm in 1904 and it consists of a table and 18 chairs. An oriental rug was kept on top of the table.
The clock collection of the Sinebrychoff Art Museum is unique in Finland. It consists of two grandfather clocks, a wall clock, four table clocks and two pocket watches. The most remarkable piece of the collection is the table clock with a mechanism to play music that Paul Sinebrychoff bought to his wife Fanny as a Christmas present in 1900. The clock was made by Zacharias Besck (the elder or the younger) from Stockholm at the beginning of the 18th century. The clock includes eight cylinders to play different tunes. Only members of the Swedish royal family have similar table clocks in their possession. Paul Sinebrychoff bought the gilded pocket watch from an auction at Bukowskis in Stockholm in October 1902. The watch bears the signature: Baillon, Paris. There is an enamel decoration depicting Venus and Jupiter on top of clouds on the cover at the back of the watch. Amor with his bow is observing the meeting at the bottom of the picture.
The silverware collection of Paul and Fanny Sinebrychoff consists of 29 pieces, which were mainly collected by Fanny Sinebrychoff. The collection is an enlightening cross-section of Nordic silversmithing over a period of about a hundred years (1660‒1760). It includes pieces made in the Nordic cities such as Copenhagen, Stockholm and Christiania (now Oslo) and those made by silversmiths from more rural towns. Part of the collection is exhibited in the house museum.
The porcelain pieces were collected by Fanny Sinebrychoff. The collection includes almost three hundred pieces of Chinese and European porcelain, such as sets by Meissen and Chinese-inspired Delft vases.
The collection of the Sinebrychoffs includes ten glass pieces and parts of glass lamps. The collection has goblets, tumblers and trophies, mainly from the 18th and 19th centuries, made in Central Europe.
Paul and Fanny Sinebrychoff’s collection also includes candlesticks, vases and stands. These are exhibited in the rooms of the house museum.