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Heritage · Ujjain

Vedh Shala (Jantar Mantar)

Eighteenth-century observatory built by Maharaja Jai Singh II in the city once regarded as India’s astronomical prime meridian.

Ujjain was the reference point—the zero meridian—of classical Indian astronomy, and the Tropic of Cancer passes close by. In the eighteenth century Maharaja Sawai Jai Singh II of Jaipur built one of his five observatories here.

Its masonry instruments, including a large sundial (Samrat Yantra), still work, and a small planetarium on the campus is popular with children.

Visiting tips

  • Visit on a sunny day to see the sundial in action.
  • Go in the morning in April–May to avoid the afternoon heat.

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