1. Baroque Architecture
The Baroque is a period as well as the style that used exaggerated motion and clear, easily interpreted detail.
The style started around 1600 in Rome, Italy and spread to most of Europe

2. Baroque refer to a "rough or imperfect pearl“
In informal usage, the word baroque can simply mean that something is "elaborate", with many details,

3. In particular, the term was used to describe its eccentric redundancy and noisy abundance of details, which sharply contrasted the clear and sober rationality of the Renaissance.
Expressionism is often compared to Baroque.[7] A difference between the two is that "Expressionism doesn't shun from the violently unpleasant effect, while baroque does.

4. Baroque palaces are built around an entrance of courts, grand staircases and reception rooms of sequentially increasing luxury.

5. In Baroque architecture, new emphasis was placed on bold massing, colonnades, domes, light-and-shade, 'painterly' color effects, and the bold play of volume and void. In interiors, Baroque movement monumental staircases that had no parallel in previous architecture.
The other Baroque innovation in worldly interiors was the state apartment, a processional sequence of increasingly rich interiors that culminated in a presence chamber or throne room or a state bedroom. The sequence of monumental stairs followed by a state apartment was copied in smaller scale everywhere in aristocratic dwellings.
Augustusburg Palace near Cologne
Trevi Fountain in Rome

6. Baroque architecture was taken up with enthusiasm in central Germany Austria and Russia
In England the culmination of Baroque architecture was embodied in work by Sir Christopher Wren, Sir John Vanbrugh and Nicholas Hawksmoor, from ca to ca
Many examples of Baroque architecture and town planning are found in other European towns, and in Latin America.
Town planning of this period featured radiating avenues intersecting in squares, which took cues from Baroque garden plans. In Sicily, Baroque developed new shapes and themes as in Noto, Ragusa and Acireale "Basilica di San Sebastiano".

7. Francis Ching described Baroque architecture as "a style of architecture originating in Italy in the early 17th century and variously prevalent in Europe and the New World for a century and a half, characterized by free and sculptural use of the classical orders and ornament, dynamic opposition and interpenetration of spaces, and the dramatic combined effects of architecture, sculpture, painting, and the decorative arts."[12]

8. Beaux-Arts architecture
Beaux-Arts architecturea[›] expresses the academic neoclassical architectural style taught at the École des Beaux-Arts in Paris. The style "Beaux Arts" is above all the cumulative product of two-and-a-half centuries of instruction under the authority, first, of the Académie royale d'architecture (1671–1793), then, following the French Revolution of the late 18th century, of the Architecture section of the Académie des Beaux-Arts (1795— ).
The organization under the Ancien Régime of the competition for the Grand Prix de Rome in architecture, offering a chance to study in Rome, imprinted its codes and aesthetic on the course of instruction, which culminated during the Second Empire (1850–1870) and the Third Republic that followed. The style of instruction that produced Beaux-Arts architecture continued without major interruption until 1968.[1]

9. The Beaux-Arts style heavily influenced US architecture in the period from 1880 to 1920.
Grand Central Terminal (Station opened 1871, Terminal 1903), New York City

10. Characteristics
Beaux-Arts building decoration presenting images of the Roman goddesses .
Note the naturalism of the postures and the channeled rustication of the stonework.
Beaux-Arts architecture depended on sculptural decoration along conservative modern lines, employing French and Italian Baroque and Rococo formulas combined with an impressionistic finish and realism.
Beaux-Arts integrate sculpture with architecture.

11. Rusticated and raised first story[2]
Flat roof[2]
Rusticated and raised first story[2]
Hierarchy of spaces, from "noble spaces"—grand entrances and staircases— to utilitarian ones
Arched windows[2]
Arched and pedimented doors[2]
Classical details:[2] references to a synthesis of historicist styles and a tendency to eclecticism; fluently in a number of "manners"
Symmetry[2]
Statuary,[2] sculpture (bas-relief panels, figural sculptures, sculptural groups), murals, mosaics, and other artwork.
Classical architectural details.
The Iowa, a Beaux-Arts condominium in Washington, D.C.

12. Art Nouveau
Art Nouveau is an international philosophy[2] and style of art, architecture and applied art—especially the decorative arts—that were most popular during 1890–1905.[3]
The name "Art Nouveau" is French for "new art".
A reaction to academic art of the 19th century, it is characterised by organic-- especially floral and other plant-inspired-- motifs, as well as very stylised, flowing curvilinear forms.[4]
Art Nouveau is a philosophy of design according to which artists should work on everything from architecture to furniture, making art part of ordinary life.[5
Staircase of the Maison & Atelier of Victor Horta.
representing the highest expression of the influential Art Nouveau style in art and architecture

13. The style was influenced strongly by Czech artist Alphonse Mucha, when Mucha produced a lithographed poster, which appeared on 1 January 1895 in the streets of Paris as an advertisement for the play Gismonda by Victorien Sardou, featuring Sarah Bernhardt.[6] It popularised the new artistic style and its creator to the citizens of Paris. Initially named Style Mucha, (Mucha Style), his style soon became known as Art Nouveau.[7]
Eliseyev Emporium (1903) in St. Petersburg, Russia

14. In architecture, hyperbolas and parabolas in windows, arches and doors are common, and decorative mouldings 'grow' into plant-derived forms. Like most design styles, Art Nouveau sought to harmonise its forms. The text above the Paris Metro entrance uses the qualities of the rest of the iron work in the structure.[37]

15. Art Nouveau in architecture and interior design eschewed the eclectic revival styles of the 19th century. Though Art Nouveau designers selected and 'modernised' some of the more abstract elements of Rococo style, such as flame and shell textures, they also advocated the use of very stylised organic forms as a source of inspiration, expanding the 'natural' repertoire to use seaweed, grasses, and insects.
The Casa Batlló, already built in 1877, was remodelled in the Barcelona manifestation of Art Nouveau

16. Relationship with contemporary styles and movements
Art Nouveau artists readily used new materials, machined surfaces and abstraction in the service of pure design.
Art Nouveau architecture made use of many technological innovations of the late 19th century, especially the use of exposed iron and large, irregularly shaped pieces of glass for architecture. By the start of World War I, however, the stylised nature of Art Nouveau design—which was expensive to produce—began to be disused in favour of more streamlined, rectilinear modernism, which was cheaper and thought to be more faithful to the plainer industrial aesthetic that became Art Deco.
began in Paris in the 1920s