It attracted investment from 1,800 Irish investors. Now, the first 20 properties owned by the Dolphin Trust have been put on the market by its German administrator as it seeks to unravel an alleged “pyramid scheme”. The properties being sold are spread across Germany – seven buildings in Brandenburg, three in Berlin with the rest dotted around in other cities and towns including Dusseden Castle. There is also a vast ruin in the Mecklenburg-Vorpommern area in north Germany, a property used in brochures used to attract in Irish and other investors. Dolphin, later renamed the German Property Group (GPG), filed…