cattle – the latter was especially relevant in Moldavia, which remained an under-populated country of pastures). In time, much of the resources were tied to the Ottoman economy, either through monopolies on trade that were only lifted in 1829, after the Treaty of Adrianople (which did not affect all domains directly), or through the raise in direct taxes - the one demanded by the Ottomans from the princes, as well as the ones demanded by the princes from the country's population. Taxes were directly proportional with Ottoman requests, but also with the growing importance of Ottoman appointment and sanctioning of princes in front of election by the boyars and the boyar Council – (drawing in a competition among pretenders, which also implied the intervention of creditors as suppliers of bribes). The fiscal system soon included taxes such as the văcărit (a tax on head of cattle), first introduced by Iancu Sasul in the 1580s. The economic opportunities offered brought about a significant influx of Greek and Levantine financiers and officials, who entered a stiff competition with the high boyars over appointments to the Court. As the manor system suffered the blows of economic crises, and in the absence of salarisation (which implied that persons in office could decide their own income), obtaining princely appointment became the major focus of a boyar's career. Such changes also implied the decline of free peasantry and the rise of serfdom, as well as the rapid fall in the importance of low boyars (a traditional institution, the latter soon became marginal, and, in more successful instances, added to the population of towns); however, they also implied a rapid transition towards a monetary economy, based on exchanges in foreign currency. Serfdom was doubled by the much less numerous slave population (robi), composed of migrant Roma and captured Nogais. The conflict between princes and boyars was to become exceptionally violent – the latter group, who frequently appealed to the Ottoman court in order to have princes comply with its demands, was persecuted by rulers such as Alexandru Lăpușneanu and John III. Ioan Vodă's revolt against the Ottomans ended in his execution (1574). The country descended into political chaos, with frequent Ottoman and Tatar incursions and pillages. The claims of Mușatins to the crown and the traditional system of succession were ended by scores of illegitimate reigns; one of the usurpers, Ioan Iacob Heraclid, was a Protestant Greek