While I am having a little Advent carnival over here I may as well add the O Antiphon House to this series of posts.
This is a great explanation of O Antiphons. This thread on the 4Real Board contains an entire parade of O Antiphon houses with photos and links showcasing the many varieties moms have created. I'm pretty sure I gleaned ideas for our house here.
The year we made them, we (ok, Joe) searched craft stores high and low to find the house shape I wanted, so when he finally found it he was so excited he bought three. Making two extra to give as gifts was easy enough. Enjoy!