Book excerpt: The Nusantara Kingdoms refer to a network of kingdoms that once ruled the Indonesian archipelago before the colonial period. The history of the Nusantara Kingdoms dates back to the 4th century AD, when the Indonesian archipelago became a crucial trading center in Southeast Asia. The Nusantara Kingdoms had varied characteristics depending on their geographical location, religion, culture, and relationships with other kingdoms. The glory of the Nusantara Kingdoms also influenced the development of arts, architecture, and literature in the Indonesian region. In this book, we will delve further into the history of the Nusantara Kingdoms and their cultural heritage that is still visible today.