This paper discusses the development of the New Zealand Parliamentary Library in the context of other significant parliamentary libraries in the English-speaking world. There are four phases of development in New Zealand's 150 years, which are also observable in other parliamentary libraries. The four phases are: getting established, building a strong library collection, supporting library functions, and focusing upon Parliament. This paper tells the story of one library's development, highlighting the influences, connections, and similarities with other well-known examples. Although the world's parliamentary libraries take varying paths because of the different cultures, parliamentary models, and national library frameworks in which they operate, comparisons can be fruitful.