The museum building is 100 years old

Our Telecom Museum is housed in the building at Vlaggemanstraat 15 in Rotterdam Noord. This building was built in 1923 as a telephone exchange Rotterdam North. So this year is 100 years old. We would like to pay more attention to that. So if you know anything about the building, please let us know. We are particularly looking for documents, photos, stories, anecdotes, etc.