Purpose This paper aims to explore how the accounting and management practices of monastic institutions were shaped by their surrounding social, political, geographical and economic environments, as well as religious ideologies, during critical historical periods. Design/methodology/approach By applying institutional theory and the comparative international accounting history perspective, this study conducts a comparative analysis of archival records from two monasteries, examining how their accounting and managerial practices were influenced by differing institutional logics. The research relies on systematic archival data collection, complemented by secondary sources, to analyze how religious beliefs shaped the accounting and management practices of these institutions and the degree of convergence between the two. Findings This study found that both monasteries adapted their accounting and management practices to their external environments. San Placido demonstrated resilience amidst disruptions such as wars and earthquakes, while Silos showed financial sophistication through diverse income streams. The resilience of these institutions was driven by their ability to align internal operations with external political, economic and social factors. This adaptability, coupled with strategic management, enhanced their capacity to maintain financial stability, illustrating the direct link between external changes, organizational resilience and improved financial health. Research limitations/implications This study highlights the historical interplay between religious principles and accounting management practices in Benedictine monasteries by comparing two monasteries. It reveals how external environments shape internal operations, showcasing the resilience and adaptability of these institutions in maintaining financial sustainability through the alignment of external pressures with internal resilience mechanisms, which in turn bolster their financial health. Originality/value This research contributes valuable insights to historical managerial and accounting literature, shedding light on the financial resilience and strategies used by Benedictine monasteries. It underscores the enduring respectful legacy of their accounting practices and the unique interplay between spiritual devotion and organizational structure within these institutions.