Frankfurt is Germany's financial center, home to Deutsche Bank, Commerzbank, DZ Bank, KfW and the ECB. Data protection in banking overlaps here with BaFin requirements, MaRisk, the KWG and anti-money-laundering law. External DPOs for Frankfurt banks need a deep understanding of the interfaces between data protection and supervisory law. Alongside them, the large audit firms (the Big Four), consultancies like Accenture and KPMG, and the pharma cluster (Sanofi, Merck) shape the client landscape. Frankfurt Airport and the logistics hub add further data protection complexity through international data transfers and employee monitoring.