简介：FromPBS:ThedomethatcrownsFlorence’sgreatcathedralofSantaMariadelFiore—theDuomo—isatoweringmasterpieceofRenaissanceingenuityandanenduringsourceofmystery.Stillthelargestmasonrydomeonearthaftermorethansixcenturies,itistallerthantheStatueofLibertyandweighsasmuchasanaveragecruiseship.Historiansandengineershavelongdebatedhowitssecretivearchitect,FilippoBrunelleschi,managedtokeepthedomeperfectlyalignedandsymmetricalasthesidesroseandconvergedtowardthecenter,40storiesabovethecathedralfloor.Hislaborerstoiledwithoutsafetynets,applyingnovel,untriedmethods.Over4millionbricksmightcollapseatanymoment—andwestilldon’tunderstandhowBrunelleschipreventedit.Totestthelatesttheories,ateamofU.S.masterbricklayerswillhelpbuildauniqueexperimentalmodelDuomousingperiodtechniques.Willitstayintactduringthefinalprecariousstagesofclosingoverthetopofthedome?…