Artificial beehives flourish on the roof of Frankfurt's Museum of Modern Art, an art project that shows once more that beekeeping in big cities is all the fashion.
In other cities like New York and Tokyo, similar beekeeping, honey-producing projects can be found on the roofs of famous hotels.
The Jumeirah chain of luxury hotels also has on the terraces of its skyscrapers in Frankfurt a number of beehives that produce honey for their guests' breakfasts.
The practice of beekeeping has also caught on at other big-city establishments like the Waldorf Astoria Hotel in New York.
Honey is in vogue, as can also be appreciated in some of the latest fragrances by designer Marc Jacobs called "Honey."
German artists Florian Haas and Andreas Wolf are also beekeepers and on the roof of Frankfurt's Museum of Modern Art are several beehives in six to eight boxes.
In the high season some 50,000 bees swarm in each box, but in winter the number diminishes because so many of them die.
The European honey bee (Apis mellifera) lives in societies - swarms - made up of the queen, the worker bees and the drones.
Haas and Wolf's bees have produced this year some 120 kilos (264 pounds) of honey, a minuscule amount attributed to local weather conditions - the cold of winter continued in Germany until May. EFE