Your pictures: Concrete jungle

Each week we publish a gallery of readers' pictures on a set theme. This week the theme is concrete jungle and we begin with a photo by Fabian Rivers taken in Birmingham, England.

David Parker: "A city worker walking past offices at Broadgate, London."

Marfin Arifin: "Looking up the central nave vaulting of Gaudi's masterpiece Sagrada Familia in Barcelona. Construction is still in progress with expected completion around 2026, the centenary of Gaudi's death."

Daniel Coulomb: "A tree surviving between the buildings of Sao Paulo, Brazil, home to more than 11 million people."

Mary Jean Thomson: "Taken at the Chi Lin Nunnery in Hong Kong, a peaceful oasis in the middle of the city."

Mike Frederickson: "The Fremont Troll is a mixed media - concrete, rebar and wiremesh - public art sculpture under Seattle's Aurora Bridge, representing the folk tale troll in Three Billy Goats Gruff."

James Deans: "For me this picture sums up the scary weird place that a concrete jungle can be. The picture was taken in Zurich."

Velislav Kazakov: "Turcotte interchange, Montreal, Canada."

Richard Harrison: "St Peter's Seminary, near Cardross in Argyll and Bute, a modernist triumph of architectural design is forgotten and at the mercy of both natural and human degradation."

And finally a photo of New York taken by Jane Lewis. Next week the theme is violet and the deadline for your entries is 26 June. If you would like to enter, send your pictures to yourpics@bbc.co.uk. Further details and terms can be found by following the link below this gallery.