In September 2015, CORE completed the refurbishment of its offices Citibank total area of 750 sq.m. on Othonos Street in Syntagma Square in Athens. The architectural design of the project belongs to A&M Architects. Citibank is one of the largest banking organizations worldwide, a member of Citigroup, which has completed 200 years of continuous operations and serves more than 200 million customers in 100 countries worldwide.