Columbia subject headings:
Astronomical clocks--China--History.
China--History--Tang dynasty, 618-907.
China--Politics and government.
Harvard subject headings:
Astronomical clocks--China--History.
Buddhism and philosophy.
Buddhism--China--History--581-960
Ming-tʻang (Luoyang, China)
Spherical astronomy--History.
Statues--China.
Towers--China
Utopias--Religious aspects--Buddhism
Wu hou, Empress of China, 624-705
Princeton subject headings:
Astronomical clocks--China--History.
Buddhism and philosophy.
Buddhism--China--581-960.
Spherical astronomy.
Towers--China.
Wu hou, Empress of China, 624-705.