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RobertMayerGymnasium Heilbronn Knigliche Realanstalt Heilbronn erbaut bis Stadtbaumeister Gustav Wenzel um Widmann Gustav. en RobertMayerGymnasiumHeilbronn KniglicheRealanstaltHeilbronn erbautbis StadtbaumeisterGustavWenzel um Widmann Gustav Gustav Widmann Hrsg Knigliche Realanstalt Heilbronn JahresBericht der Kniglichen Realanstalt