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.
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Further low cloud, mist and hill fog is expected with outbreaks of rain and drizzle throughout the night.
Cloud will continue to thicken and lower through the evening, giving outbreaks of rain and drizzle overnight.
Organisers say it was a chance for everyone to remember Mylee and celebrate her life.