The Indonesian Pavilion in the 1964 New York World's Fair was built as a grand house for Indonesia's first participation in an international exposition after its independence. It was created from 1957-60s, which was enlivened by a series of monumental projects known as nation-building projects. The pavilion was the only luxurious structure built outside the country. While the nation-building project has been studied by scholars, an explanation of the Indonesian Pavilion has not yet been found. Therefore, this paper, by comparing nation-building projects and the Indonesian Pavilion, aims to describe the architectural characteristics of the Indonesian Pavilion and clarify its position as a nation-building project.