Add punctuation: Our third division Building Systems will grow
A: "Our third division - Building Systems - will grow.

Add punctuation: Company news Press releases Product news
A: Company news, Press releases, Product news

Add punctuation: The building is beautiful and wellkept from the outside inside one could maybe still sense the grandeur of former times the large paintings with maritime motives were still there but only sign of decay and negligence
A:
The building is beautiful and well-kept from the outside, inside one could maybe still sense the grandeur of former times, the large paintings with maritime motives were still there, but only sign of decay and negligence.