It was granted its Royal Charter in 1837 under King William IV. Supplemental Charters of 1887, 1909 and 1925 were replaced by a single Charter in 1971, and there have been minor amendments since then.
কোন বছরগুলোতে রয়্যাল ইন্সটিটিউটকে সম্পূরক সনদ প্রদান করা হয়েছিল?
1887, 1909 and 1925