Mathias Spihler (c. 1640-February 1691) was a Swedish architect of German descent from Södermalm, Stockholm. In 1670-1 he aided Jean de la Vallée in the construction of Katarina Kyrka (Catherine's Church) and him as technical superintendent at the church in 1671.[1] Spihler also built the Van der Nootska Palace between 1671 and 1672. He was married to Vallée's daughter Margaret de la Vallée. He is buried in Kungsholms kyrka (Ulrika Eleonora Church) which he built in 1672.