It's a treasure trove of more than 8 million New Zealand historical documents that can be explored, online and for free,
And now Papers Past is celebrating 21 years since it's launch.
The service is organised into five formats - newspapers, magazines and journals, letters and diaries, parliamentary papers, and books
Its popularity is growing each year and it now has around 30 million page views and around two million visitors annually.
To tell us more about the celebrations and what's next for the service is National Library Service Manager Emerson Vandy