BOSTON (AP) — A historic Boston church is asking a developer to pay $19 million to compensate for shadows cast by a proposed tower.

The Boston Globe reports that Old South Church claims the proposed Back Bay Station project will cast a shadow on the church that will cause moisture damage and darken stained glass windows. Church officials say $4 million of the payment will go toward repairs of the 142-year-old church while the remainder will fund an affordable home program.

Boston Properties, the developer behind the project, says the request is unreasonable. The developer says it's unlikely the projected shadows would cause significant damage to the church.

Boston Properties plans to build three office and apartment towers atop the train depot.