Kosovo was conquered by the Ottoman Empire along with the other remnants of the Serbian Empire in the period following the Battle of Kosovo (1389). Although the Ottomans didn't force the Catholic and Orthodox Christian population to convert to Islam, there was strong social pressure (such as not having to pay the jizya) as well as political expediency to do so, which ethnic Albanians did in far greater numbers (including the entire nobility) than Serbs, Greeks and others in the region. Many Albanian Catholics converted to Islam in the 17th and 18th centuries, despite attempts by Roman Catholic clergy to stop them, including a strict condemnation of conversion – especially for opportunistic reasons such as jizya evasion – during the "Concilium Albanicum", a meeting of Albanian bishops in 1703. Whilst many of these converts stayed crypto-Catholics to a certain extent, often helped by pragmatic lower clerics, the higher Catholic clergy ordered them to be denied the sacraments for their heresy. Efforts to convert the laraman community of Letnica back to Catholicism began in 1837, but the effort was violently suppressed – the local Ottoman governor put laramans in jail. After the Ottoman Empire abolished the death penalty for apostasy from Islam by the Edict of Toleration 1844, several groups of crypto-Catholics in Prizren, Peja and Gjakova were recognised as Catholics by the Ottoman Grand Vizier in 1845. When the laramans of Letnica asked the district governor and judge in Gjilan to recognise them as Catholics, they were refused however, and subsequently imprisoned, and then deported to Anatolia, from where they returned in November 1848 following diplomatic intervention. In 1856, a further Tanzimat reform improved the situation, and no further serious abuse was reported. The bulk of conversion of laramans, almost exclusively newly-borns, took place between 1872 and 1924.