The tree you could eat
The earliest decorated Christmas trees we can actually document come from German-speaking Europe, and they were dressed from the pantry: apples, gilded nuts, wafers and small baked goods, paper flowers. The decorations were largely edible or ephemeral, consumed or discarded when the season ended. Nothing on those trees was an heirloom. That is the important point, and the strange one: the ornament as a kept object, the thing this whole site is about, had to be invented.
Glass enters, and the object begins
The town of Lauscha, in Germany's Thuringian mountains, had blown glass since the sixteenth century. By the middle of the nineteenth, its home workshops were producing kugeln: hand-blown glass spheres, silvered inside to catch candlelight. Unlike an apple or a wafer, a kugel survived the season. It went into a box in January and came out again in December, the same object, carrying another year with it. The heirloom ornament begins there: not with a decree or a legend, but with a material that could last.
The moment it became a keepsake
Two things turned the glass ball into the object collectors know. First, export: American five-and-dime retail, F.W. Woolworth's most consequentially, began importing German glass ornaments in the 1880s and sold them by the millions, which put a box of keepable glass into ordinary households on both sides of the Atlantic. Second, memory: once a family owned the same physical objects year after year, the objects started absorbing the years. A bauble bought for a first married Christmas, or the one a child always hung crooked, stopped being decoration. The full industrial story, through Shiny Brite, Hallmark's Keepsake era, and the handmade revival, is told in Chapter I.
"The ornament was invented twice: once in glass, and once in memory."
Everything else in this chapter, from the pickle's suspicious legend to the spider's web to the collectors who keep glass with no Christmas in it at all, descends from that second invention. An object that holds memory will gather customs around it the way a tree gathers ornaments.
Continued in Part the Second, The Christmas Traditions