The oak is named after the owner of the field where it grows – Nikola Angelov, known as Grandpa Kolyo. After hard work he would rest under its thick shade. Legend has it that the tree was part of a dense forest, located where the village lies today. Because of the forest and the river, its first residents settled there and founded the village. They were Bulgarians, hiding from the Turkish forays. This old oak is a symbol of Studena and a pillar of the Bulgarian spirit and faith of its residents.