What city did Ibn Sina settle in? <SEP> Ibn Sina subsequently settled at Rey, in the vicinity of modern Tehran, the home town of Rhazes; where Majd Addaula, a son of the last Buwayhid emir, was nominal ruler under the regency of his mother (Seyyedeh Khatun). About thirty of Ibn Sina's shorter works are said to have been composed in Rey. Constant feuds which raged between the regent and her second son, Shams al-Daula, however, compelled the scholar to quit the place. After a brief sojourn at Qazvin he passed southwards to Hamadãn where Shams al-Daula, another Buwayhid emir, had established himself. At first, Ibn Sina entered into the service of a high-born lady; but the emir, hearing of his arrival, called him in as medical attendant, and sent him back with presents to his dwelling. Ibn Sina was even raised to the office of vizier. The emir decreed that he should be banished from the country. Ibn Sina, however, remained hidden for forty days in sheikh Ahmed Fadhel's house, until a fresh attack of illness induced the emir to restore him to his post. Even during this perturbed time, Ibn Sina persevered with his studies and teaching. Every evening, extracts from his great works, the Canon and the Sanatio, were dictated and explained to his pupils. On the death of the emir, Ibn Sina ceased to be vizier and hid himself in the house of an apothecary, where, with intense assiduity, he continued the composition of his works.
What city did Ibni Sina settle in? <SEP> Ibni Sina subsequently settled at Rey, in the vicinity of modern Tehran, the hometown of Rhazes; where Majd Addaula, a son of the last Buwayhid emir, was nominal ruler under the regency of his mother (Seyyedeh Khatun). About thirty of Ibni Sina's shorter works are said to have been composed in Rey. Constant feuds which raged between the regent and her second son, Shams al-Daula, however, compelled the scholar to quit the place. After a brief sojourn at Qazvin they passed southwards to Hamadãn where Shams al-Daula, another Buwayhid emir, had established himself. At first, Ibni Sina entered into the service of a high-born lady; but the emir, hearing of their arrival, called them in as medical attendant, and sent them back with presents to their dwelling. Ibni Sina was even raised to the office of vizier. The emir decreed that they should be banished from the country. Ibni Sina, however, remained hidden for forty days in sheikh Ahmed Fadhel's house, until a fresh attack of illness induced the emir to restore them to their post. Even during this perturbed time, Ibni Sina persevered with their studies and teaching. Every evening, extracts from their great works, the Canon and the Sanatio, were dictated and explained to their pupils. On the death of the emir, Ibni Sina ceased to be vizier and hid themself in the house of an apothecary, where, with intense assiduity, they continued the composition of their works.