After the formal investiture he finally confirmed his predecessors ' charters and privileges granted to Ragusan merchants .
Tvrtko 's second accession had to be legitimized with a new coronation , which took place during a stanak in August 1421 .
After the formal investiture Tvrtko finally confirmed Tvrtko 's predecessors ' charters and privileges granted to Ragusan merchants .
Tvrtko 's second accession had to be legitimized with a new coronation , which took place during a stanak in August 1421 .