Runner-up to the brilliant Minding in the Oaks at Epsom in 2016, Architecture has been absent since finishing sixth to Journey in the Qipco British Champions Fillies & Mares Stakes at Ascot last October. She holds an entry in this year's renewal.
Palmer has yet to decide whether to run Architecture on Saturday in the Group Three contest over a mile and a three furlongs, in which he also has Best Of Days engaged.
"Of the two, Architecture is more likely to go, but it's still early in the week and there are other opportunities for her," said the Newmarket trainer.
"I'm delighted with her and to have her back. Her work has been really pleasing."