The Seven Wonders of the Ancient World were

2. Hagia Sophia

Hagia Sophia is a Greek Orthodox basilica in Istanbul, Turkey. Commissioned by Emperor Justinian I and completed in 537 AD, Hagia Sophia was the largest cathedral in the world for almost 1,000 years. With its characteristic massive dome, this masterpiece of Byzantine architecture also contains a vast array of decorative influences characterizing the historical and cultural changes in the region. Hagia Sophia served as the Roman Empire's first Christian Cathedral until the Ottoman Empire conquered the city in 1453. Although much of the city was left in disrepair, Hagia Sophia was maintained and converted into a mosque. It served as the principal mosque of the city for almost two hundred years. In 1935, the building was decommissioned as a church and converted into a museum.

The Porcelain Tower of Nanjing was a fifteenth century pagoda, built during the Ming Dynasty on the banks of the Qinhuai River. One of the tallest buildings in China at the time of its completion, the tower rose nine stories high to a height of 260 feet. A 184-step spiral staircase rose through the center of the pagoda, and the roof was crowned with a golden pineapple.
3. Porcelain Tower of Nanjing

The outside of the tower consisted of white porcelain bricks which reflected the sun's rays in dazzling fashion. At night, lamps were hung on the outside for further illumination. Landscapes, flowers, animals and Buddhist images adorned the sides of the tower through decorative stonework and glazes. Considered by some to be one of the Seven Wonders of the World, the Porcelain Tower of Nanjing was a well-known landmark and cultural icon for hundreds of years.

Although there had been plans to increase its height, the tower was destroyed during the Taiping rebellion of the 1850s. The rubble was used for other building projects, and the site was eventually abandoned. However, in 2010 a private individual donated one billion yuan (approximately 156 million US dollars) to the city of Nanjing to finance a reconstruction.