Seljuq dynasty, who for centuries had used it in their mosque building, but it was perfected during the Safavids when they invented the haft- rangi, or seven colour style of tile burning, a process that enabled them to apply more colours to each tile, creating richer patterns, sweeter to the eye. The colours that the Persians favoured were gold, white and turquoise patterns on a dark-blue background. The extensive inscription bands of calligraphy and arabesque on most of the major buildings where carefully planned and executed by Ali Reza Abbasi, who was appointed head of the royal library and Master calligrapher at the Shah's court in 1598, while Shaykh Bahai oversaw the construction projects. Reaching 53 meters in height, the dome of Masjed-e Shah (Shah Mosque) would become the tallest in the city when it was finished in 1629. It was built as a double-shelled dome, spanning 14 m between the two layers and resting on an octagonal dome chamber. Contemporary Iranian architecture in and outside Iran Contemporary architecture in Iran begins with the advent of the first Pahlavi period in the early 1920s. Some designers, such as Andre Godard, created works such as the National Museum of Iran that were reminiscent of Iran's historical architectural heritage. Others made an effort to merge the traditional elements with modern designs in their works. The Tehran University main campus is one such example. Others, such as Heydar Ghiai and Houshang Seyhoun, have tried to create completely original works, independent of prior influences. Dariush Borbor's architecture successfully combined modern architecture with local vernacular. Borj-e Milad (or Milad Tower) is the tallest tower in Iran and is the sixth tallest tower in the world. Future architecture in Iran Major construction projects are underway all around Iran. Iran is developing Isfahan City Center, which is the largest mall in Iran and the largest mall with a museum in the world. It includes a hotel, indoor amusement park, and food court, among other amenities. The Flower of the East Development Project is another grand project on Kish Island in the Persian Gulf. The project, includes one '7-star' and two '5-star' hotels, three residential areas, villas and apartment complexes, coffee shops, luxury showrooms and stores, sports facilities and a marina. Azerbaijani style The "Azerbaijani style" or "Azeri style" () is a style () of Iranian architecture developed in Iran's historic Azerbaijan region defined by Mohammad Karim Pirnia.