Members of Library of Birmingham staff, council representatives and Carillion employees gathered in the dramatic rotunda which will house the five-storey book wall.
The rotunda, at the very heart of the library, features a series of cantilevered circular balconies each providing access to a different part of the shelves that comprise the book wall.
Escalators zigzag across the space, providing stunning views throughout the library and access for all to over 400,000 books, more than double the amount currently on show at Central Library.
More top news
A football tournament has been held in memory of 14 year old rapper who was killed in a car accident last year.
Apart from a few outbreaks of rain in the south, it will be a dry night with patches of frost or fog forming under any cloud breaks.
Most places will be dry. Broken cloud will allow a slight ground frost to form away from coasts.