Here are two shots – the bottom one by Andrew Taylor and the top one by Tim Power – of Robert Sheppard performing his ambulatory/site-specific text Sudley House at Sudley House in November 2004. The performance text may be read at:
Click at the top from the page you find here to Preamble to Instructions before you reach the First Room (and continue until the Ninth). Then read the Notes.
There is also a (later) 'reading' copy of the poem, which may be read here.