Hooke's surviving drawings show that several versions of the monument were submitted for consideration: a plain obelisk, a column garnished with tongues of fire, and the fluted Doric column that was eventually chosen. The real contention came with the problem of what type of ornament to have at the top. Initially, Wren favoured a statue of a phoenix with outstretched wings rising from the ashes, but as the column neared completion he decided instead on a 15 ft statue either of Charles II, or a sword-wielding female to represent a triumphant London; the cost of either being estimated at £1,050. Charles himself disliked the idea of his statue atop the monument and instead preferred a simple copper-gilded ball "with flames sprouting from the top", costing a little over £325, but ultimately it was the design of a flaming gilt-bronze urn suggested by Robert Hooke that was chosen.