Following the design of the decorative lighting the architectural concept was developed in which the main theme is the arch, a historic building element which extends through the world and in particular the turkish history of architecture. A complex steel structure was proposed as the tunnel access, not just an entrance portal. The architecture of this access, in a symbolic and functional sense consists of 80 interlocking arches, with different radii and inclination placed in series, whose each developed length reaches 30m with the supports span of 20m.

Yapı Merkezi was founded in 1965 for ‘producing and implementing contemporary construction projects to serve humanity by creating an environment of happiness’. Yapı Merkezi develops projects on a global scale and, through good risk management, achieves its goals of providing its products and services with promised quality, on time and by sticking to the budget. While achieving its goals, Yapı Merkezi never discards aesthetic attitude, which forms a bridge of judgement between planned and applied, and passionately strives for the beautiful. It considers professional and human values as well as technical measurements, and tirelessly processes information while proceeding with its activities in order to be a benchmark organization for others. Yapı Merkezi is a group of industry-leading companies that are open, transparent, innovative and committed to complete every project on time. The company is respectful and sensitive to the histories, traditions, customs, moral values, laws and environment of the communities where it operates. SK Engineering & Construction (SK E&C) is the construction and engineering arm of the SK Group. SK Group, which is the third largest group of companies in Korea, is ranked 46th on the list of the largest 250 contractors in the world by ENR (Engineering News Record) magazine. SK E&C was also ranked 39th on the Fortune Global 500 list in 2015. Since its establishment in 1977, SK E&C, has been competing in the construction and engineering fields of all industries including civil infrastructure, architecture, housing and industrial facilities. It has played a role in making South Korea known for its precision in construction and engineering.