The Institute of Plant and Microbial Biology (IPMB, formerly the Institute of Botany, renamed in 2005) had its Research Building constructed in 1974 and completed in 1975. Due to an increase in staff by 1981, the Institute needed additional space. As a result, an expansion was carried out, and the new building was completed and opened in 1985.
Source:Pursuing Excellence-History Website of Academia Sinica