'iron tree' (detail) by Ai Weiwei currently installed in the Yorkshire Sculpture Park

 

 

the tree outside the chapel

 

 

inside the chapel are 45 chairs which have been set out in the nave in nine rows of five, set at a precise separation specified by Ai Weiwei. on the first Sunday of every month, there are readings of his father's poems. it sounds simple, but the effect is powerful: many of the chairs are museum pieces, but people are welcomed to sit on them and the spacing means that they are companionable but isolated.