Eclecticism in architecture in the context of "Art Nouveau"

Eclecticism is a conceptual approach that does not hold rigidly to a single paradigm or set of assumptions, but instead draws upon multiple theories, styles, or ideas to gain complementary insights into a subject, or applies different theories in particular cases. However, this is often without conventions or rules dictating how or which theories were combined.

Eclecticism in ethics, philosophy, politics, and religion is often compared to syncretism, but the two concepts differ in their approach to combining elements from different traditions. While syncretism in religion involves the merging or assimilation of several distinct traditions into a new, unified system, eclecticism adopts elements from various systems without necessarily integrating them into a single cohesive framework. This distinction allows for a broader, more inclusive approach in eclecticism, where the selection is based on individual merit or preference rather than an attempt to create a new unified tradition.

Alfred Waterhouse RA PPRIBA (19 July 1830 – 22 August 1905) was an English architect, particularly associated with Gothic Revival architecture, although he designed using other architectural styles as well. He is perhaps best known for his designs for Manchester Town Hall and the Natural History Museum in London. He designed other town halls, the Manchester Assize buildings—bombed in World War II—and the adjacent Strangeways Prison. He also designed several hospitals, the most architecturally interesting being the Royal Infirmary Liverpool and University College Hospital London. He was particularly active in designing buildings for universities, including both Oxford and Cambridge but also what became Liverpool, Manchester and Leeds universities. He designed many country houses, the most important being Eaton Hall in Cheshire. He designed several bank buildings and offices for insurance companies, most notably the Prudential Assurance Company. Although not a major church designer he produced several notable churches and chapels.

Financially speaking, Waterhouse was probably the most successful of all Victorian architects. He designed some of the most expensive buildings of the Victorian age. The three most costly were Manchester Town Hall, Eaton Hall and the Natural History Museum; they were also among the largest buildings of their type built during the period. Waterhouse had a reputation for being able to plan logically laid out buildings, often on awkward or cramped sites. He built soundly constructed buildings, having built up a well structured and organised architectural office, and used reliable sub-contractors and suppliers. His versatility in stylistic matters also attracted clients. Though expert within Neo-Gothic, Renaissance Revival and Romanesque Revival styles, Waterhouse never limited himself to a single architectural style. He often used eclecticism in his buildings. Styles that he used occasionally include Tudor revival, Jacobethan, Italianate, and some only once or twice, such as Scottish baronial architecture, Baroque Revival, Queen Anne style architecture and Neoclassical architecture.

Second Empire style, also known as the Napoleon III style or Haussmann style, is a highly eclectic style of architecture and decorative arts originating in the Second French Empire. It was characterized by elements of many different historical styles, and also made innovative use of modern materials, such as iron frameworks and glass skylights. It flourished during the reign of Emperor Napoleon III (1852–1870) and had an important influence on architecture and decoration in the rest of Europe and North America. Major examples of the style include the Opéra Garnier (1862–1871) in Paris by Charles Garnier, the Institut National d'Histoire de l'Art, the Church of Saint Augustine (1860–1871), and the Philadelphia City Hall (1871–1901). The architectural style was closely connected with Haussmann's renovation of Paris carried out during the Second Empire; the new buildings, such as the Opéra, were intended as the focal points of the new boulevards.

Victorian architecture is a series of architectural revival styles in the mid-to-late 19th century. Victorian refers to the reign of Queen Victoria (1837–1901), called the Victorian era, during which period the styles known as Victorian were used in construction. However, many elements of what is typically termed "Victorian" architecture did not become popular until later in Victoria's reign, roughly from 1850 and later. The styles often included interpretations and eclectic revivals of historic styles (see historicism). The name represents the British and French custom of naming architectural styles for a reigning monarch. Within this naming and classification scheme, it followed Georgian architecture and later Regency architecture and was succeeded by Edwardian architecture.

Although Victoria did not reign over the United States, the term is often used for American styles and buildings from the same period, as well as those from the British Empire.

Ottoman architecture is an architectural style that developed under the Ottoman Empire over a long period, undergoing some significant changes during its history. It first emerged in northwestern Anatolia around the end of the 13th century and developed from earlier Seljuk Turkish architecture, with influences from Byzantine and Iranian architecture along with other architectural traditions in the Middle East. Early Ottoman architecture experimented with multiple building types over the course of the 13th to 15th centuries, progressively evolving into the classical Ottoman style of the 16th and 17th centuries. This style integrated the Ottoman tradition with influences from the Hagia Sophia, resulting in monumental mosque buildings focused around a high central dome with a varying number of semi-domes. The most important architect of the classical period is Mimar Sinan, whose major works include the Şehzade Mosque, Süleymaniye Mosque, and Selimiye Mosque. The second half of the 16th century also saw the apogee of certain Ottoman decorative arts, most notably in the use of Iznik tiles.

Beginning in the 18th century, Ottoman architecture was opened to external influences, particularly Baroque architecture in Western Europe. Changes appeared during the style of the Tulip Period, followed by the emergence of the Ottoman Baroque style in the 1740s. The Nuruosmaniye Mosque is one of the most important examples of this period. The architecture of the 19th century saw more influences imported from Western Europe, brought in by architects such as those from the Balyan family. Empire style and Neoclassical motifs were introduced and a trend towards eclecticism was evident in many types of buildings, such as the Dolmabahçe Palace. The last decades of the Ottoman Empire saw the development of a new Ottoman revivalist style, also known as the First National Architectural Movement, by architects such as Mimar Kemaleddin and Vedat Tek. Since the dissolution of the Ottoman Empire in 1922, the traditional Ottoman style has been imitated in the construction of many new mosques in Turkey and in some constructions projects beyond Turkey.