Mother Bolca is a figure defined as an evliya among the people. The fame of this woman saint, who has an important place in Thracian folk culture, has nowadays exceeded the borders of Thrace and has reached Turkey and the Balkans. Bolca Ana, whose real name is rumored to be Fatma, lived in Mutlu village of Babaeski district of Kırklareli province. She is known to have lived in the 15th century.
The story in the inscription hung on the place where her tomb is located is as follows: Fatma from Kofalçalı (the old name of Mutlu village), who fell in love with one of the Rumelia raiders, became resentful of life when her beloved did not return as a martyr in the last expedition she participated in, and retreated into seclusion in the woods near her village. From then on, her prophecies began to be told among the people and she was believed to be a saint. In such a period, Fatih Sultan Mehmed Khan, who went on a campaign against Europe, stopped and stayed in the vicinity of Kofalça village on the campaign route between Babaeski-Edirne with his army. While some of the soldiers were wandering around, they came to the grove area with plenty of greenery and water where Fatma Ana lived near today's Mutlu village.
Fatma Ana was cooking food for herself here. The soldiers, smelling the food, stop by her. Fatma Ana God rejoices when she sees her guests, welcomes them and realizes that they are hungry and wants to offer them food. When the soldiers, who are a little crowded in number, see that the food is not enough, they do not want to eat, thinking that it will not be enough for them. "Mother, this food is not enough for us," they call out. Then Mother Fatma starts to fill the plates of the soldiers and says "Eat, my daughters, eat plenty, eat plenty". As the soldiers ate, they saw that the food cooked in the pot did not decrease, on the contrary, it increased and they filled their bellies to the brim.
The soldiers left happily and were astonished by this wise event. They began to think that Fatma Ana was a saint and first told the incident to their friends in the camp. The incident gradually spreads among the soldiers and reaches the ears of the sultan. Sultan Mehmed the Conqueror, who was curious about the subject, listened to the incident from the witnesses. After listening to what happened, the Sultan became more curious and wanted to see and get to know Mother Fatma.
He takes some of his commanders and soldiers who witnessed the incident and comes to the place where Fatma Ana lives. The Sultan gets off his horse and wants to kiss her hand and calls her as follows: "From now on your name will be Bolca Ana".
From that day on, Fatma Ana's name became known as "Bolca Ana". In her old age, she started to be known as "Grandma Bolca" in that neighborhood. For this reason, today she is more commonly referred to as "Grandma Bolca" among the people.
According to another rumor, Fatma showed another miracle here. According to this rumor, Fatma offered the Sultan to leave the pikes that the soldiers tied to their horses there that night. Her request was accepted by the Sultan. When the next day came, the soldiers who came to get their pikes saw that each pike had turned into a sapling. Thus, it was definitively judged that Bolca Ana was a saint.
Bolca Ana, who is rumored to have died at the end of the XVth century, was buried in this wooded area where she spent her life and showed her miracles. Today, her grave has turned into a place of veneration. Especially in the week of May 6 (Hıdırellez), which has an important place in Thracian folk culture, sacrifices are sacrificed here, wishes are made and prayers are offered. However, it is known that visits are made for the same purpose at other times of the year from all over the country, especially from Thrace.
(https://sks.trakya.edu.tr/pages/bolca-ana-kimdir)