What is the fine-grained topic of the following text: This building has realized four concepts: (1) Symbolic architecture suitable for the 125th anniversary of Nihon University: The building rises toward the sky, expressing a sense of security and reliability in succeeding the original law school design, as well as adopting the university’s traditional design source of symmetry and brickwork. Only return the topic.
The architectural concepts of a building for Nihon University's 125th anniversary.