One of the grandest building in Johor Bahru is Istana Besar of Johor Bahru, a Colonial-Classical design palace stately sits facing the banks of Selat Tebrau and Singapore. Regarding on Sultan Ibrahim of Johor Crowning Ceremony that were held on 23rd of March 2015, the renovation work started on 2013. The project mainly focused on 2 main area which is Dewan Singgahsana (Throne Hall) and Dewan Santapan (Banquet Hall). The Palace itself already 149 years old, and because of that, the existing Interior Design concept have to be retained. This is include on the concept of Throne design that taken from Buckingham Palace of London with a bit of taste of Islam by featuring the crescent-moon and star on the top of the Throne. The overall main colour scheme were navy blue which is the colour of Johore flag.