centuries, parts of Khorasan were contested between the Safavids and the Uzbeks. A part of the Khorasan region was conquered in 1722 by the Ghilji Pashtuns from Kandahar and became part of the Hotaki dynasty from 1722 to 1729. Nader Shah recaptured Khorasan in 1729 and chose Mashhad as the capital of Persia. Following his assassination in 1747, the eastern parts of Khorasan, including Herat was annexed with the Durrani Empire. Mashhad area was under control of Nader Shah's grandson Shahrukh Afshar until it was captured by the Qajar dynasty in 1796. In 1856, the Iranians, under the Qajar dynasty, briefly recaptured Herat; by the Treaty of Paris of 1857, signed between Iran and the British Empire to end the Anglo-Persian War, the Iranian troops withdrew from Herat. Later, in 1881, Iran relinquished its claims to a part of the northern areas of Khorasan to the Russian Empire, principally comprising Merv, by the Treaty of Akhal (also known as the Treaty of Akhal-Khorasan). Cultural importance Khorasan has had a great cultural importance among other regions in Greater Iran. The literary New Persian language developed in Khorasan and Transoxiana and gradually supplanted the Parthian language. The New Persian literature arose and flourished in Khorasan and Transoxiana where the early Iranian dynasties such as Tahirids, Samanids, Saffirids and Ghaznavids (a Turco-Persian dynasty) were based. The early Persian poets such as Rudaki, Shahid Balkhi, Abu al-Abbas Marwazi, Abu Hafas Sughdi, and others were from Khorasan. Moreover, Ferdowsi and Rumi were also from Khorasan. Until the devastating Mongol invasion of the 13th century, Khorasan remained the cultural capital of Persia. It has produced scientists such as Avicenna, Al-Farabi, Al-Biruni, Omar Khayyam, Al-Khwarizmi, Abu Ma'shar al-Balkhi (known as Albumasar or Albuxar in the west), Alfraganus, Abu Wafa, Nasir al-Din al-Tusi, Sharaf al-Dīn al-Ṭūsī, and many others who are widely well known for their significant contributions in various domains such as mathematics, astronomy, medicine, physics, geography, and geology. Khorasan artisans contributed to the spread of technology and goods along the ancient trade routes have been traced to this ancient culture, including art objects, textiles and zoomorphic metalworks. Decorative antecedents of the famous "singing bowls" of Asia may have been invented in ancient Khorasan. In Islamic theology, jurisprudence and philosophy, and in Hadith collection, many of the greatest Islamic scholars came from Khorasan, namely Imam Bukhari, Imam Muslim, Abu Dawood, Al-Tirmidhi, Al-Nasa'i, Al-Ghazali, Al-Juwayni, Abu Mansur Maturidi,