question: Who was the British historian who was most notable for studying a 62 m high minaret located in the Shahrak District, Ghor Province in Afghanistan?
answer: Ralph Pinder-Wilson
context: Title: Chehel Dokhtaran minaret
  Passage: Chehel Dokhtaran minaret (Persian: مناره چهل دختران‎ ‎ ) is a historical minaret in Isfahan, Iran.  It is located in the Jouybareh district of Isfahan.  According to the kufic inscription on the minaret, it is built in 1112.  It is the fifth oldest minaret in Iran, which has an inscription.  There's a big window on the minaret, which faces the qibla.  This feature does not exist in other minarets of Isfahan.  There is a spiral staircase in the minaret, which leads to the top of it.  This minaret is 21 meters high.  The minaret had been originally higher, but in the course of time, its height has been decreased.  The minaret towers over the city quarter and can be seen from the far distance, but it is difficult to reach it through the mazes of winding alleys and narrow streets.
  Title: Sarban minaret
  Passage: Sarban minaret (Persian: مناره ساربان‎ ‎ ) is a historical minaret in Isfahan, Iran.  It dates back to the Seljuq era.  The Sarban minaret is located in the north of Jouybareh district, not far from Chehel Dokhtaran minaret.  It seems that there was a mosque beside this minaret in the past, but it does not exist any more.  The minaret consists of seven different parts.  The first part has brick bolster work.  The second and third parts have masterly decorative brickwork.  The fourth part is its first crown, which has brick muqarnas with turquoise tiles.  The fifth part has decorative bricks.  the sixth part is the second crown and the seventh part is the vertex of the minaret.  The minaret is 54 m (some say 48 m ?)  high and is the highest historical minaret in the Isfahan province.
  Title: Ghor University
  Passage: Ghor University (Persian: دانشگاه غور‎ ‎ ) is located in Ghor province, northern Afghanistan.
  Title: Rahrovan minaret
  Passage: The Rahrovan minaret is located 6 km northeast of Isfahan.  The minaret is 30 m high.  It dates back to the Seljuq era and has almost kept its original shape, but its inscriptions has been damaged severely.  It is the fourth oldest minaret in Isfahan province after Ali minaret, Sarban minaret and Ziyar minaret.  Its decorations are simple, featuring a stripe of rhombic shapes around the minaret, in which the names of Mohammad and Ali are repeated.  On the top of the minaret, there is a window for muezzin and signal fire for orientation of caravans and passengers in the desert.
  Title: Minaret of Jam
  Passage: The Minaret of Jam is a UNESCO World Heritage Site in western Afghanistan.  It is located in a remote and nearly inaccessible region of the Shahrak District, Ghor Province, next to the Hari River.  The 62 m high minaret was built around 1190 entirely of baked bricks and is famous for its intricate brick, stucco and glazed tile decoration, which consists of alternating bands of kufic and naskhi calligraphy, geometric patterns, and verses from the Qur'an.  As of 2013 the minaret remained on the list of World Heritage in Danger, under serious threat of erosion, and was not actively being preserved.  In 2014 the BBC reported that the tower was in imminent danger of collapse.
  Title: Shahrak District
  Passage: Shahrak District is located in the central part of Ghor Province, Afghanistan.  The population is 58,200.  The district center is Dahan-e Falezak (Shahrak).
  Title: Ziyar minaret
  Passage: The Ziyar minaret is a historical minaret in the Isfahan province in Iran.  The minaret is located 33 km to the east of Isfahan city near the village Ziyar on the southern side of Zayanderud .  It is 51 m high and is the second highest historical minaret in the province Isfahan after the Sarban minaret and the only three-storey minaret in the province, the height of which has not decreased in the course of time.  No construction dates have been mentioned in its kufic inscriptions, but because of its similarity to the minarets of Seljukid era, it is estimated that it was built in the 12th century.  The crown of the minaret has turquoise tiles.
  Title: Ralph Pinder-Wilson
  Passage: Ralph Pinder-Wilson (17 January 1919 – 6 October 2008) was a British historian of Islamic art.  He is most noteworthy for his studies of Afghan architecture while Director of the British Institute of Afghan Studies in Kabul (1976–82) which included his study of the Minaret of Jam which is today a UNESCO World Heritage site.  He graduated from Christ Church Oxford and then joined the Indian Army where he learnt Persian.
citations: Ralph Pinder-Wilson Minaret of Jam