A pointed falsework or a false decentering:

Research on the Tsipiani bridge, a unique single-arched stone bridge in Greece's Zagori region, reveals that its pointed arch is likely due to a 'false decentering' technique rather than traditional construction methods. The study proposes the use of 'stitching,' a reinforcement method for masonry structures, to address structural vulnerabilities and preserve the bridge's integrity. This approach aims to enhance resistance against compressive, shear, and tensile forces while connecting loose parts in the masonry. The findings challenge conventional assumptions about stone bridge construction and offer a practical solution for conservation efforts.

Papageorgiou, A., & Lolos, L. (2022). A pointed falsework or a false decentering: Technical Annals, 1(1), 175–192. https://doi.org/10.12681/ta.32177