The Jagatjit Palace is the centrepiece of Maharaja Jagatjit Singh's project to make Kapurthala a "Paris of the East." Modelled on the Palace of Versailles and the Chateau de Fontainebleau, it was designed by French architects and completed in 1908. The facade presents an entirely convincing piece of French Baroque architecture, with the characteristic symmetry, mansard roofs, and formal gardens that you would expect to find in the Ile-de-France — placed inexplicably in the middle of Punjab.
The palace is now the Sainik School military academy and is not open to the public. You can see the building from the road and through the gates, which gives a good enough view of the exterior to understand the scale of the maharaja's ambition. The formal gardens visible through the railings are still maintained.
Even from the outside, the Jagatjit Palace is the most extraordinary thing in Kapurthala — the sheer strangeness of encountering French Baroque architecture of this quality in northern India makes it worth the visit.