G-27 Kozlu Coal Enterprises T.A.Ş. It is a company established by İşbank in 1926 to carry out mining activities in Kozlu. In 1934, Seyfi Arkan, one of the important architects of the Republican period in the region, implemented projects for administrative and social facilities and sports fields. In the 1940s, a neighborhood called Kılıç was created to meet the social life and housing needs of the workers, as well as the mining activities. This project, which is a planned settlement, is the first urban design study of the region. The project also includes workers', engineers' and civil servants' homes, a primary school, tennis court, dormitories for adolescent workers, and road arrangements. Kılıç Mahallesi, which has been one of the most unique settlements of Zonguldak on a neighborhood scale for many years, has lost its former importance after processes such as the demolition of the school and cinema building and the evacuation of the lodgings. While the Ekonoma building, which meets the shopping needs of the employees, is used for another purpose, the tennis court, which provides the training of many athletes, has been transformed into a basketball court. Kılıç Mahallesi has been completely evacuated today in line with the policies of the TTK (Turkish Hard Coal Company) to reduce its service and production.