The new KESKUS International Estonian Centre under construction in The Annex will be unlike any other building in Toronto, or anywhere else, for that matter. Toronto has achieved many impressive building feats, including what was once the world's tallest freestanding structure and the first retractable-roof stadium. Though restoration is nearly complete, the project team notes that heritage windows will be restored at a later stage of the construction process. Other work on the heritage component includes connections to the new structure in the form of openings carved into the structure for adjoining bridges. Meanwhile, the final stages of TTC remediation work below grade have been completed, with the project team anticipating further waterproofing of underground support beams to wrap up this month.