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 Ibna Sina settle in? <SEP> Ibna 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 Ibna Sina's shorter works are said to have been composed in Rey. Constant feuds that 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, she passed southwards to Hamadn, where Shams al-Daula, another Buwayhid emir, had established himself. At first, Ibna Sina entered into the service of a high-born lady, but the emir, hearing of her arrival, called her in as medical attendant, and sent her back with presents to her dwelling. Ibna Sina was even raised to the office of vizier. The emir decreed that she should be banished from the country. However, Ibna Sina, however, remained hidden for forty days in Sheikh Ahmed Fadhel's house, until a fresh attack of illness induced the emir to restore her to her post. Even during this perturbed time, Ibna Sina persevered with her studies and teaching. Every evening, extracts from her great works, the Canon and the Sanatio, were dictated and explained to her pupils. On the death of the emir, Ibna Sina ceased to be vizier and hid herself in the house of an apothecary, where, with intense assiduity, she continued the composition of his works.