Birmingham's Hidden Spaces 'Unlocked' was a month-long initiative, where we got hold of the keys to some of Birmingham's finest hidden architectural treasures.

It featured 25 wide-reaching events including inspiring talks, unique exhibitions and exclusive building tours, throughout the month of June 2015.

To kick off proceedings we published a special 12-page Hidden Spaces supplement in the Birmingham Post, featuring articles from Ben Waddington, Ally Standing and our very own Jack Tasker and Steve Townsend. If you missed it don't worry, you can read all the articles here.

We got lots of other amazing press coverage too, including features on BBC Midlands Today, ITV Central News, BBC Radio 4 and BBC Radio WM, not to mention countless newspaper and magazine articles.

For our popular series of Wednesday evening talks we teamed up with some fantastic organisations such as the Lunar Society, the Civic Society, and Shout About Brum. The final talk with LoveBrum and Birmingham Architectural Association was to a sell-out audience of around 350 people.

We had lots of exciting open days all across the city. The Victoria Law Courts was the most popular with over 1,300 visitors in just four hours.

Our Instameet on 6 June with Visit Birmingham brought together nearly 100 Instagrammers. Over the course of the weekend 1,284 pictures were posted on Instagram using the hashtags #BrumMeetJune6 and #HiddenBrum. We picked our favourite pictures, which were featured in the Birmingham Mail and will go on to feature in a special exhibition at Ikon Gallery in November.

We love an exhibition at Birmingham's Hidden Spaces and this year we organised two! The first was hidden away in the basement of Piccadilly Arcade.

In case you didn't know, Piccadilly Arcade was originally a cinema, so we thought it would be a good idea to put on an exhibition that celebrated some of the lost traces of Birmingham's cinema heritage. Did you know celluloid was invented in Birmingham?

Our flagship exhibition this year was held in the spectacular Birmingham Municipal Bank. We celebrated the unique history of this great civic institution as well as the exciting future of the surrounding Arena Central site.

As well as the exhibition in the Banking Hall, we opened up the Safe Deposit room in the vaults, which still has over 10,000 shimmering safe deposit boxes.

We had various events and tours throughout the week at the Bank. We even held a coffee morning for a group of former employees of the Bank.

Thank you to everyone who came along and supported Birmingham's Hidden Spaces: Unlocked 2015. We had a lot of fun and we hope you did too. Thanks to our amazing team of volunteers, who did a brilliant job at every event. Thanks also to our sponsors who made it all possible.