To celebrate Building’s 170th year we thought we’d look back over the period at some of the UK’s finest construction achievements and ask you the readers to vote for the one that ultimately deserves the title of “greatest”. Just click on one of the six options in the poll on the left.

Of course, it was very difficult to shortlist just six construction projects for such a title. Along the way our editorial team considered other worthy achievements that they felt were groundbreaking or changed construction in some way (see the box below for the names that didn’t make it on to the list).

1. London Underground (1863)

London Underground was the world’s first underground railway which transformed urban mass transit.

2. Weavers Mill, Swansea (1898)

Weavers Flour Mill was the first reinforced concrete building in the UK which made it easy and cheap to construct large buildings.

3. Olympic venues (2012)

The venues for the ‘Greatest Show on Earth’, aka the London 2012 Olympics, were delivered on time and to budget

4. Preston bypass (1958)

Preston bypass was the UK’s first motorway which significantly speeded up road transport.

5. Ritz hotel (1906)

The Ritz is the first steel framed building in the UK which made it easy and cheap to construct large buildings.

6. The Channel Tunnel (1984)

The Channel Tunnell was significant as it was the first major project to funded privately, a fact much trumpeted by Margaret Thatcher at the time.