The forts described in this book are those built between the period of the Portuguese arrival to the Dutch East Indies (1512-1942). In this period hundreds of Calonial and Nusantara forts were built in the Indonesian Archipelago. Colonial forts are forts built by the Europeans until the 1800s, primarily to serve as a defence for their trade ports. These forts were then used by the army. The Nusantara forts are those built by different communities of the Indonesian archipelago. During certain period, they also include forts that were built by foreigners based on requests from certain Indonesia communities. The diversities of these forts, its enchanting sites and interesting history are the main attractions of this book.