Baklahorani (alternatively, Bakla Horani; Greek: Μπακλαχοράνι) or Tataula carnival (Greek: Αποκριές στα Ταταύλα) is a carnival celebrated annually in Istanbul, Turkey, by members of the local Greek-Orthodox community on Shrove Monday, the last Monday before Lent. The traditional celebration began in 19th century or earlier, and ceased when it was banned by the Turkish authorities in 1943. However, beginning in 2010 there has been a revival initiative.

For almost five centuries, the local Greek communities throughout Istanbul (former Constantinople) celebrated pre-Lent festivals with colorful events that included bawdy parades and parties held indoors and in the street. These lasted for weeks before the 40-day Lent period. Baklahorani, on Shrove Monday, the last day of the carnival season before Lent, became the culminating event in the mid-19th century. It started as a masked parade that proceeded through Istanbul's Greek neighborhoods, beginning with the elite area of Pera and gathering people along the way before proceeding finally to Tatavla (now Kurtuluş) for festivities on the square at Hagia Dimitri Church. The name of the event literally translates as 'I eat beans', a reference to Lenten dietary restrictions. Although the event was led by local Greeks, the celebrations were not limited among the Greek community of the city, but were open to everyone. It was also an opportunity to bring together people from various neighborhoods, while they gathered for the final celebrations in the Kurtuluş, a neighbourhood in Şişli district that time known as Tataula and nicknamed Little Athens.