The Evangelists' spires will be surmounted by sculptures of their traditional symbols: a winged bull (Saint Luke), a winged man (Saint Matthew), an eagle (Saint John), and a winged lion (Saint Mark). The central spire of Jesus Christ is to be surmounted by a giant cross; its total height () will be less than that of Montjuïc hill in Barcelona, as Gaudí believed that his creation should not surpass God's. The lower spires are surmounted by communion hosts with sheaves of wheat and chalices with bunches of grapes, representing the Eucharist. Plans call for tubular bells to be placed within the spires, driven by the force of the wind, and driving sound down into the interior of the church. Gaudí performed acoustic studies to achieve the appropriate acoustic results inside the temple. However, only one bell is currently in place.