 The number of structures rose to approximately twenty during the late 18th-century reign of King Andrianampoinimerina.By the late 20th century, the Rova's structures had been reduced to eleven, representing various architectural styles and historical periods.The largest and most prominent of these was Manjakamiadana, also known as the "Queen's Palace" after Queen Ranavalona I, for whom the original wooden palace was built between 1839–1841 by Frenchman Jean Laborde.