Before revision: Date 1866 Source Auktionshaus Zeller Eugène-François de Block (1812–1893).|Schoolchildren in German painting by Eugène-François de Block, 1866.
After revision: Date 1866 Source Auktionshaus Zeller Eugène-François de Block (1812–1893).|Schoolchildren in Belgian painting by Eugène-François de Block, 1866.