On 13 November 1886, a few days after the foundation stone of Chiefs College was laid, the school was renamed Aitchison College. Construction of the main building, now known as Old Building, began in 1887 and was finished in 1890, along with a gymnasium and a hospital. Soon after that, the main building became the center of academic life at Aitchison, moving classes away from their previous locations in the boarding houses and rented bungalows. Construction on other buildings continued as the school attracted more wards and princes.