The Maiden Tower (; ) is a 12th-century monument in the Old City, Baku, Azerbaijan. Along with the Shirvanshahs' Palace, dated to the 15th century, it forms a group of historic monuments listed in 2001 under the UNESCO World Heritage List of Historical Monuments as cultural property, Category III. It is one of Azerbaijan's most distinctive national emblems, and is thus featured on Azerbaijani currency notes and official letterheads. The Maiden Tower houses a museum, which presents the story of the historic evolution of Baku city. It also has a gift shop. The view from the roof takes in the alleys and minarets of the Old City, the Baku Boulevard, the house of Isa bek Hajinski and a wide vista of the Baku Bay. The Tower is covered by cloud of mysteries and legends which are rooted to the history and culture of Azerbaijan. Indeed, some epics became a subject for scenario for ballets and theatre's plays. The Maiden Tower (ballet) is a world-class Azerbaijani ballet created by Afrasiyab Badalbeyli in 1940 and ballet's remake was performed in 1999. Consequent to the receding of the sea shoreline of the Caspian Sea, a strip of land emerged. This land was developed between the 9th and 15th centuries, when the walls of the old city, the palace including the huge bastion of the Maiden Tower were built. History Some scientific sources indicate that the Maiden Tower is a paramount example of Zoroastrianism and the pre-Islamic architecture in Iran and Azerbaijan. Prof Davud A.Akhundov provides archeological and architectural evidences and argues that the Tower is Zoroastrians' Fire temple-Tower which had 7 fire exits on the top of the tower. Zoroastrian believed that there are 7 Steps or 7 Sky to reach heaven. Davud A.Akhundov and Hassan Hassanov date the fire temple-tower approximately as 8th-7th century B.C. The Maiden Tower set in the south-east part of Icheri Sheher, has mystique and hoary history and legends that are linked to two periods, though not conclusively established. The area was first settled in the Palaeolithic period. Sara Ashurbeyli, Professor and prominent historian and expert in the history of Baku has calculated that the tower foundations, which extend 15 metres below ground level and the bottom three stories above ground, were originally built between the 4th and 6th centuries CE and points out the marked difference in the stone used in the tower compared to the stone