One Arts Plaza has that big white square on the side, and the Hunt Oil Tower bulges out like a, well, like a giant H. So I guess it makes sense that downtown’s new Dee and Charles Wyly Theatre has a big rectangular hole at the top on its west side (at far left in this pic). At first I thought they just hadn’t finished the building yet. But I’ve learned since that it’s actually an important architectural feature. On the big media tour this morning, I asked the architect Rem Koolhaas–a tall, gaunt Dutchman who kept checking his cellphone–about the thinking behind the big hole. “You have to have some things where your interest can dwell for awhile,” he explained. Then he went back to checking his phone.