 By the early 19th century, the order had been severely weakened by the loss of its priories throughout Europe.Only 10% of the order's income came from traditional sources in Europe, with the remaining 90% being generated by the Russian Grand Priory until 1810.This was partly reflected in the government of the Order being under Lieutenants, rather than Grand Masters, in the period 1805 to 1879, when Pope Leo XIII restored a Grand Master to the order.