The folk poetry tradition in Turkish literature, as indicated above, was strongly influenced by the Islamic Sufi and Shi'a traditions. Furthermore, as partly evidenced by the prevalence of the
aşık/
ozan tradition—which is still alive today—the dominant element in Turkish folk poetry has always been song. There are, broadly speaking, two traditions of Turkish folk poetry: • the
aşık/
ozan tradition, which—although much influenced by religion, as mentioned above—was for the most part a secular tradition; • the explicitly religious tradition, which emerged from the gathering places (
tekkes) of the Sufi religious orders and Shi'a groups. Much of the poetry and song of the
aşık/
ozan tradition, being almost exclusively oral until the 19th century CE, remains anonymous. There are, however, a few well-known
aşıks from before that time whose names have survived together with their works: the aforementioned Köroğlu (16th century CE); Karacaoğlan (1606?–1689?), who may be the best-known of the pre-19th century
aşıks; Dadaloğlu (1785?–1868?), who was one of the last of the great
aşıks before the tradition began to dwindle somewhat in the late 19th century; and several others. The
aşıks were essentially minstrels who travelled through Anatolia performing their songs on the
bağlama, a
mandolin-like instrument whose paired strings are considered to have a symbolic religious significance in Alevi/Bektashi culture. Despite the decline of the
aşık/
ozan tradition in the 19th century, it experienced a significant revival in the 20th century thanks to such outstanding figures as
Aşık Veysel Şatıroğlu (1894–1973), Aşık Mahzuni Şerif (1938–2002),
Neşet Ertaş (1938–2012), and many others. The tradition of
tekke literature shared a similar basis with the
aşık/
ozan tradition in that the poems were generally intended to be sung, generally in religious gatherings, making them somewhat akin to Western
hymns (Turkish
ilahi). One major difference from the
aşık/
ozan tradition, however, is that—from the very beginning—the poems of the
tekke tradition were written down. This was because they were produced by revered religious figures in the literate environment of the
tekke, as opposed to the milieu of the
aşık/
ozan tradition, where the majority could not read or write. The major figures in the tradition of
tekke literature are: Yunus Emre (1240?–1320?), who is one of the most important figures in all of Turkish literature; Süleyman Çelebi (?–1422), who wrote a highly popular long poem called ''Vesiletü'n-Necat
("The Means of Salvation", but more commonly known as the Mevlid''), concerning the birth of the
Islamic prophet Muhammad; Kaygusuz Abdal (1397–?), who is widely considered the founder of Alevi/Bektashi literature; and Pir Sultan Abdal (?–1560), whom many consider to be the pinnacle of that literature. ==Folklore==