Friedrich Seyler | |
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 Anabaptista larvatus by Friedrich Seyler | |
| Born | 13 December 1642 |
| Died | 31 January 1708 (aged 65) |
| Other names | Friedrich Seiler, Fridericus Seilerus, Fridericus Seylerus |
| Occupation | Swiss theologian |
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Friedrich Seyler (13 December 1642 – 31 January 1708), also spelled Friedrich Seiler, was a Swiss Reformed pastor and theologian from Basel, noted for his work Anabaptista Larvatus on Anabaptism.