He was granted the custodianship of this ancient building.

custodianship 是由名词 custodian（监护人、保管人）加上后缀 -ship 构成的名词。custodian 来自拉丁语 custos（看守者），-ship 表示"身份、职位或状态"。custodianship 指"监护权、保管权"的正式职位或身份。