In the Ottoman Empire, during the Tanzimat period, industrialization was given importance; factory structures started to be established. In this period, Kocaeli became a busy trade city where factories were established, with its proximity to Istanbul and its port. The cloth Factory, one of the first factories of this period, was an industrial structure established in Kocaeli in 1843 to meet the textile needs of the army. Sultan Abdülmecid decided to establish a broadcloth factory, and the budget to be covered by the state, to be independent of Europe and provide job opportunities to the local people by producing the broadcloth, which had been supplied from abroad until this period. In the factory, which grew with the structures added over time, production was ensured with the machines brought from abroad. Since Kocaeli was an important industrial city in this period, it was desired to be occupied by the English and Greeks in the First World War. With the bombing of the factory by the English in 1920, the structures were severely damaged; production stopped. The factory, which was transferred to the military after this period, remains in the military area today, and many factory structures are unusable. In this study, together with the history of the Broadcloth factory, the architectural features of the old weaving atelier and its chimney called the “Warehouse with Chimney” in the factory were examined. It is seen in the archive documents that the factory became dysfunctional after the bombardment, but the warehouse was not damaged during this period. However, until 1999, the documents related to the building were not reached, and it was determined that one of the workshop buildings was lost, and changes were made to the surviving parts. The original condition of the building, which is an industrial heritage, has been evaluated with its lost elements and archival documents.