1. The Duomo,, Florence, Italy

2.  The Basilica di Santa Maria del Fiore (English: Basilica of Saint Mary of the Flower) is the main church of Florence, Italy. Il Duomo di Firenze, as it is ordinarily called, was begun in 1296 in the Gothic style to the design of Arnolfo di Cambio and completed structurally in 1436 with the dome engineered by Filippo Brunelleschi. The exterior of the basilica is faced with polychrome marble panels in various shades of green and pink bordered by white and has an elaborate 19th-century Gothic Revival façade by Emilio De Fabris.

3.  The cathedral complex, located in Piazza del Duomo, includes the Baptistery and Giotto's Campanile (bell tower). The basilica is one of Italy's largest churches, and until development of new structural materials in the modern era, the dome was the largest in the world. It remains the largest brick dome ever constructed.

7.  The Florence Baptistery (Italian: Battistero di San Giovanni), also known as the Baptistry of Saint John, is a religious building in Florence, Italy, and has the status of a minor basilica. The octagonal baptistery stands in both the Piazza del Duomo and the Piazza di San Giovanni, across from Florence Cathedral and the Campanile di Giotto.

8.  The Florence Baptistery is one of the oldest buildings in the city, constructed between 1059 and 1128 in the Florentine Romanesque style. Although the Florentine style did not spread across Italy as widely as the Pisan Romanesque or Lombard styles, its influence was decisive for the subsequent development of architecture, as it formed the basis from which Francesco Talenti, Leon Battista Alberti, Filippo Brunelleschi, and the other architects created Renaissance architecture.

12.  On the death in 1302 of Arnolfo di Cambio, the first Master of the Works of the Cathedral, and after an interruption of more than thirty years, the celebrated painter Giotto di Bondone was nominated as his successor in 1334. At that time he was 67 years old. Giotto concentrated his energy on the design and construction of a campanile (bell tower) for the cathedral. He had become an eminent architect, thanks to the growing autonomy of the architect-designer in relation to the craftsmen since the first half of the 13th century. The first stone was laid on 19 July 1334. His design was in harmony with the polychromy of the cathedral, as applied by Arnolfo di Cambio, giving the tower a view as if it were “painted”. In his design he also applied chiaroscuro and some form of perspective instead of a strict linear drawing of the campanile. And instead of a filigree skeleton of a gothic building, he applied a surface of coloured marble in geometric patterns.

15.  By Catholic tradition, the basilica is the burial site of its namesake Saint Peter, one of the twelve apostles of Jesus and, also according to tradition, the first Pope and Bishop of Rome. Tradition and strong historical evidence hold that Saint Peter's tomb is directly below the altar of the basilica. For this reason, many Popes have been interred at St. Peter's since the Early Christian period. There has been a church on this site since the time of the Roman Emperor Constantine the Great. Construction of the present basilica, replacing the Old St. Peter's Basilica of the 4th century AD, began on 18 April 1506 and was completed on 18 November 1626.

19.  The Taj Mahal "crown of palaces", pronounced is a white marble mausoleum located in Agra, Uttar Pradesh, India. It was built by Mughal emperor Shah Jahan in memory of his third wife, Mumtaz Mahal. The Taj Mahal is widely recognized as "the jewel of Muslim art in India and one of the universally admired masterpieces of the world's heritage".

20.  Taj Mahal is regarded by many as the finest example of Mughal architecture, a style that combines elements from Islamic, Persian, Ottoman Turkish and Indian architectural styles.  In 1983, the Taj Mahal became a UNESCO World Heritage Site. While the white domed marble mausoleum is the most familiar component of the Taj Mahal, it is actually an integrated complex of structures. The construction began around 1632 and was completed around 1653, employing thousands of artisans and craftsmen. The construction of the Taj Mahal was entrusted to a board of architects under imperial supervision, including Abdul-Karim Ma'mur Khan, Makramat Khan, and Ustad Ahmad Lahauri. Lahauri is generally considered to be the principal designer.

21.  n 1631, Shah Jahan, emperor during the Mughal empire's period of greatest prosperity, was grief-stricken when his third wife, Mumtaz Mahal, a Persian princess, died during the birth of their 14th child, Gauhara Begum. Construction of the Taj Mahal began in 1632. The court chronicles of Shah Jahan's grief illustrate the love story traditionally held as an inspiration for Taj Mahal. The principal mausoleum was completed in 1648 and the surrounding buildings and garden were finished five years later.