Rotterdam's grand Beursplein glows under an artificially moonlit sky in this lush Trenkler moonlight fantasy card — a genre that transformed workaday street scenes into romantic nocturnes for the Edwardian postcard craze. Double-deck electric trams numbered 138 and 141 glide across the square's cobblestones while top-hatted pedestrians and horse-drawn carts animate the foreground; behind them rises the stately Post Office building, its classical façade bathed in photographer's-darkroom blue. Dr. Trenkler & Co. of Leipzig were masters of this hand-tinted moonlight technique, producing cards of Dutch cities that were eagerly collected across Europe. The card predates the divided-back era (pre-1907), with the entire reverse reserved for the address — placing it squarely in the Pioneer/Undivided Back period. A lovely example of turn-of-the-century Rotterdam street life before the city was largely destroyed in the 1940 Blitz.