This is the 2354th most frequent Russian word.
немецкого
"Of German" or "German (genitive case)."
Referring to the language by its adjective form.
Я изучаю немецкого языка.
I am studying the German language.
Describing the origin as German, used as an adjective to qualify 'architecture'.
Учитель рассказал о немецкого происхождения архитектуры.
The teacher talked about the German-origin architecture.
Attributing authorship to someone of German nationality or origin.