Search “英国正版365中文官网（关于英国正版365中文官网的简介）->>綱址（bet91.net)手动输入-英国正版365中文官网（关于英国正版365中文官网的简介）->>綱址（bet91.net)手动输入”

The Solar Stair is a cantilevered concrete spiral in the centre of the building, with Eduardo Paolozzi’s Black Hole mosaic at the base. The stair itself represents the solar year, with 52 steps cast in concrete with seven strips to produce a total of 365 grooves inscribed on the risers, one for each day of the year.