A few more events are still due to take place in Siza and Souto de Moura's Serpentine Pavilion, which must rank with Toyo Ito's of 2002 as the best of these temporary commissions so far. On Friday 9 September at 9pm the pavilion serves as a cinema for the last time with Short Film Night: Vertical and Horizontal. The programme includes City Slivers, a New York film by Gordon Matta-Clark, who spent much of his brief creative life engaged with buildings, and Pine Barrens by Land Art exponent Nancy Holt (Robert Smithson's widow). Tickets are £5 (see www. timeout. com/parknights).
The Serpentine habitually asks the artists it features to make a limited-edition work for sale at the gallery and Siza has obliged with a silkscreen called Tea Time at the Serpentine Pavilion - a typically scratchy sketch of the interior available in an edition of 200 at £95. Contact Vicky Speer for more information (tel 020 7298 1511). For anyone wanting a cheaper souvenir of this year's building, there's a catalogue at £17.95, which includes interviews with both the architects and engineer Cecil Balmond. Meanwhile, on 6 September a new exhibition opens in the Serpentine Gallery itself: films by Oliver Payne & Nick Relph, including Driftwood, which looks at the use and 'misuse' of public space, and House and Garage, on the London suburbs.
The New York streets that feature in Matta-Clark's City Slivers are the backdrop for Rachel Whiteread's resin-and-steel water tower (pictured), now in the permanent collection of the Museum of Modern Art. With her casts of undersides of furniture, staircases, rooms and even a whole house, few artists in the last two decades have explored interior space more thoroughly or thoughtfully than Whiteread, whose forms can at once suggest a Hackney Victorian terrace and an Egyptian tomb. On Saturday 10 September from 2-5pm at Tate Britain, Reconsidering Rachel Whiteread is a study session on her work. Tickets are £15 (tel 020 7887 8888).
Next week sees the nationwide English Heritage/Civic Trust Heritage Open Days 2005, running from 8-11 September, with many properties taking part. Follow the regional links on www. heritageopendays. org