Science, the study of creation, was developed from them, as they both refer to same source of initial, perpetual and Unique truth; Allah subhana wa ta'ala. Through strict adherence to Qur'an and Sunnah, Muslims made rapid advances in the sciences, technologies, education and learning. The House of Wisdom (Arabic: بيت الحكمة; Bait al-Hikma) was a library and translation institute in Abbassid-era Baghdad, Iraq. It was a key institution in the Translation Movement and considered to have been a major intellectual center of the Islamic Golden Age. The House of Wisdom acted as a society founded by Abbasid caliphs Harun al-Rashid and his son al-Ma'mun who reigned from 813-833 CE. Based in Baghdad from the 9th to 13th centuries, many of the most learned Muslim scholars were part of this excellent research and educational institute.library. It was modeled on that of Sassanians had the purpose of translating books from Persian to Arabic and also preservation of translated books. In the reign of al-Ma'mun, observatories were set up, and The House was an unrivalled centre for the study of humanities and for sciences, including mathematics, astronomy, medicine, chemistry, zoology and geography. Drawing on Persian, Indian and Greek texts—including those of Pythagoras, Plato, Aristotle, Hippocrates, Euclid, Plotinus, Galen, Sushruta, Charaka, Aryabhata,Socrates and Brahmagupta—the scholars accumulated a great collection of knowledge in the world, and built on it through their own discoveries. Baghdad was known as the world's richest city and center for intellectual development of the time, and had a population of over a million, the largest in its time. The great scholars of the House of Wisdom included Al-Khawarizmi, the "father" of algebra, which takes its name from his book Kitab al-Jabr.