The Law of the People's Republic of China on the National Common Language and Characters implies simplified Chinese as the standard script, with Traditional Chinese being used for purposes such as ceremonies, cultural purposes (e.g. calligraphy), decoration, publications and books on ancient literature and poetry, and research purposes. Traditional Chinese remains ubiquitous on buildings predating the promotion of simplified characters, such as former government buildings, religious buildings, educational institutions, and historical monuments. Traditional Chinese is also often used for commercial purposes, such as shopfront displays and advertisements.