Rococò Style evolved in France and was adopted in Europe during the 18th Century. It took its name from the French rocaille, the rock motifs that often were part of the design.

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Architecture
Rococò architecture was a lighter, yet also more complicated version of its Baroque predecessor. It usually emphasized the asymmetry of forms and was more secular, it had no religious references. Rococò architecture brought important changes to the building of all the structures, emphasizing privacy.

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The Branicki Palace is an 18th-century magnate’s estate in Warsaw. It is located at the junction of Podwale and Miodowa Streets. This Rococò palace took inspiration from French mansions. The project was designed like a horseshoe, with a central part and two side wings. The building was set apart from the street by asymmetrical courtyard used for the visitors. On the façades, a balance was found between admirable Rococò features and rooftop windows. The main entrance was adorned with a portico of four columns with statues on the top.
Rococò Main Characteristics
Natural motives are a feature of British and French Rococò. However, in British Rococò the way of conceiving natural motifs was usually more realistic in details than those on French Rococò pieces. Elaborately carved forms were used by designers rather than architects. This is important to explain handmade decorations in Rococò design. Rococò’s design is asymmetrical most of the time. Curved forms are common in Rococò. They often recall letters S and C.

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Info source:
https://www.boundless.com/art-history/rococo-architecture