As of 2018, Christianity was particularly strong in westernmost Ukrainian regions, where most Greek Catholics lived. In central, southern and eastern regions, Christians constitute a smaller proportion of the total population, particularly low in the easternmost region of Donbass. Another religion that is present in Ukraine besides Christianity is Rodnovery (Slavic native faith), which comprises Ukrainian- and Russian-language communities (some Rodnover organizations call the religion Православ'я "Pravoslavya", "Orthodoxy", thus functioning in homonymy with Christian Orthodox churches). Crimean Tatars professing Islam represent a significant part of the population in Crimea, which prior 2014 was a subject of Ukraine, but has been since that year occupied by Russia. As of 2016, without Crimea, where Muslims formed 15% of the population in 2013, only Donbass maintains a larger community of Muslims compared to other Ukrainian regions (6%).