As banking evolved, so did its architecture, using symbolism and style to shape institutional identity and public perception. Between 1916 and 1930, Dutch banks frequently employed in-house architects to maintain brand continuity, with the Rotterdamsche Bank Association appointing Hermann Friedrich Mertens as its in-house architect. His work reflected both historical influences and changing banking trends.

Midway through the 20th century, banking institutions shifted from exclusivity and prestige toward accessibility and transparency. Through a comparative analysis of Kneuterdijk 8 (1920) and Coolsingel 119 (1949), this thesis examines how Mertens’ designs adapted to these changes. While Kneuterdijk emphasized wealth and security through traditional ornamentation, Coolsingel adopted an open and modern approach, reflecting the post-war reconstruction and a broader societal shift in banking identity. This study offers a deeper understanding of architecture’s role in shaping financial institutions’ public perception.