This is the 4202nd most frequent German word.
bemerkenswert
Remarkable or noteworthy.
In this sentence, 'bemerkenswert' is used as an adjective to describe the notable characteristics of the building's architecture.
Die Architektur dieses Gebäudes ist bemerkenswert.
The architecture of this building is remarkable.
Here, 'bemerkenswert' is applied to emphasize the notable aspect of the speed and efficiency in solving the problem.
Es ist bemerkenswert, wie schnell er das Problem gelöst hat.
It is remarkable how quickly he solved the problem.
In this case, 'bemerkenswert' is describing the significant and noteworthy nature of their progress.