Nave of the Fallen

Thick waist-high shrubs grow all about the soft prow of a hill cleared of its trees. At its crest, two stone feet seem the foundation of what may eventually be a tremendous monument. At the hill's base, a white ampitheatre of seven doors lead inside, surrounding a wide, beautiful patio.
Deeper: Newly bored into the limestone hills, a memorial of atonement is being dug out following the designs of Mid King Liddock, an archictect who lives on site. The former abbot has taken a child bride (Milan of Kreselrott) of tender years and walks with her every step he takes from his room built lavishly atop the narthex of the worship space. She loathes him.
Beyond, the nave is nearly 250ft long and a quarter as high, being carved skillfully by d4 * 100 of the nation's stonemasons. It is built in symbolic replica of the Corrheonic Stand's double cross, the transepts crossing exactly at the centerpoint of the hill above, on which the base footings have been made for an incredible double-cross that would be visible from the lowest buildings of Plath.
The nave has been designed in the inverted manner of a ship hull so that acoustics are magnified from where the chancel will be. However, where the chancel will be at the far end of the great hall, where should be further limestone, is instead a three-foot thick solid steel plate that appears the edge of something conic and enormous.
Mid King Liddock is entertained, no stranger to the artifacts of the underearth. He will likely die before the underground church is finished. The Stand more largely is furious at the hold-up in construction of their memorial to the Holy War. [d6+1] hired surveyors and geologists are mapping the steel for excavation, while Liddock himself is re-drawing the chancel to incorporate the steel somehow.
The cone is the top of the Preston Rocket, the calcified remains of an olden time effort to prepare for potential attack from space.
Full details on the Preston Rocket can be found on p. [XX]