At Rajnagar near Madhubani, Maharaja Rameshwar Singh of the Darbhanga Raj built an entire palace-town between 1884 and 1929 — the Naulakha Palace, set within a campus of some 1,500 acres dotted with eleven temples. Its carved façades and cement porticoes were among the most ambitious architecture of its day in Bihar.
The 1934 Bihar–Nepal earthquake wrecked the complex, and it was never rebuilt. Today the grand ruins stand half-swallowed by vegetation — an evocative monument to the wealth and artistic patronage of the Mithila kings. The estate is also remembered as a cradle of modern Mithila, where one of the oldest surviving Madhubani paintings was documented.