scalariform
adj. resembling a ladder

Above the facade of the Church of the Holy Sepulchre in Jerusalem is a ladder that has remained in place since the 19th century. At that time an edict was passed holding that the church’s doors and window ledges are “common ground” for the various Christian orders; as a result, no church can move anything near the window — including the ladder. It’s visible in the engraving below, which was made in 1834.

(Thanks, Randy.)