Fleck is a German painter whose work consists of views from on high of cities and natural landscapes. You can see further examples of his work at the gallery link above. He works in oil.
The geometric "cityscapes" look like stacked, multi-colored boxes but we know this is a city. Colors vary subtly from piece to piece as do the geometry. The landscapes are nearly solid green with trees interupting in bunches. Seen next to each other these pieces are a poignant recreation of the essence of country and city in basic form.