The Imperial Palace was a garden palace complex, a palace type with a long history in Islamic architecture. This palace was composed of elaborate independent pavilions set in the garden, such as the Chihil Sutun, which served as audience chambers, banqueting halls, and residential apartments for the royal family. Garden palaces were typically surrounded by a wall, but in Isfahan's case it was not a fortification wall. The Imperial Palace is also unusual in that the imperial treasury, arsenal, and cavalry were not located inside the palace complex. Stephen Blake thinks that this reflects the casual protocol of Safavid emperors whose authority derived from traditional ideas of kingship rather than military control. The name, meaning "Forty Columns" in Persian, was inspired by the twenty slender wooden columns supporting the entrance pavilion, which, when reflected in the waters of the fountain, are said to appear to be forty.
meaning "Eight Paradises" is a Safavid era palace in Isfahan.
It was built in 1669 and is today protected by Iran's Cultural Heritage Organization. Of more than forty mansions which existed in Isfahan during the rule of Safavids, this is the only one left today. Reportedly built for residence purposes of the King's harem In a dry city which is located at the edge of desert, with long hot summer, Gardens and streams of waters, beautiful roses, shades of trees, sound of birds and nightingales play a great role in our lives. In great part of Iranian literature, especially poems, gardens are beautiful parts of our lives. In holy Quran, several verses of this holy book talks about paradise, full of green trees, pure and fresh streams of water, and other blessing of Almighty Allah is promised. Gardens are a small symbol of the promised paradise. Thanks to Zayandeh rud River which has created a green ring in the neighborhood of desert. The Hasht Behesht palace was built in the centre of Baghe Bolbol (The Nightingale Garden) dates back to 1660. The palace is the most important building which was built during Shah Suleiman Safavid time. The palace experienced new styles of stucco work and stained glass and mirror works.Hasht Behesht was renovated by Fathali Shah Qajar in the 19th century. It was used as residential palace by Zele Sultan (Fathali Shah’s son). This useless man even did not maintain ornamentations of the palace. Chahar Taghi is a type of Sassanid and pre – Islamic architecture, but the style was beautifully developed and enlarged at the time of Safavid dynasty. The structure has octagonal shape and this kind of shape can be seen in various part of it. It is two storey palaces which have been seriously damaged.