This chapter analyzes the long, complex, and still ongoing construction process of the Temple of San José Obrero in Arandas, Jalisco—one of Mexico’s most significant Neo-Gothic religious buildings. The project spans more than 140 years, marked by four distinct phases. The most transformative was initiated in 1937 under architect Ignacio Díaz Morales, who reinterpreted the French Gothic style, particularly drawing inspiration from the Cathedral of Chartres. His intervention reshaped the façade, elevated the nave, and introduced a triforium and clerestory. From 1954 onward, engineer José Luis Amezcua directed construction, completing the towers and the flamboyant façade. Since 2008, a final phase has focused on building the ambulatory (girola), currently under construction, including stained-glass windows featuring Cristero martyrs and a new baptistery. The chapter emphasizes how the unfinished condition of the temple became a symbol of Catholic perseverance in a region deeply shaped by religious identity and post-revolutionary conflict. Rather than a sign of failure, the temple’s gradual, community-driven construction process illustrates the enduring power of religious architecture as a civic, symbolic, and spiritual endeavor.