The City of London’s security has become obsolete. Terrorism is evolving. Cyberattacks threaten increasingly vulnerable digital data whilst technologies dictate that we continually rely on its ubiquity. The country’s economy thrives off global trade establishing the London Stock Exchange as a principal terrorist target. The Church of England invests £4.5 billion as donations from churchgoers decline, so an interdependent solution uses new technologies to 3-dimensionally print the volatile, digital stock market data in stone in a perverse regression, providing a prophylaxis to modern terror and bestowing mutual longevity upon both the church and the economy. My addition to St. Paul’s Cathedral continuously builds itself in real-time using data from the 41 stock market industry sectors, safely archiving the then physical data in towers which grow in relation to the sector’s success. The repository has a stark, securocratic exterior with a dynamic interior richly adorned with intertwining iconographies.