3,947. More About the Curtains

Hilchos Klei HaMikdash 7:17

There were thirteen curtains in the Second Temple. Seven of these were over the seven gates of the courtyard, one was over the opening of the entry hall (the Ulam), one was over the entrance to the Sanctuary (the Heichal), two separated between the Holy and the Holy of Holies, and two were opposite them in the loft.

Hilchos Klei HaMikdash 7:18

If a curtain was rendered ritually unclean by something that was itself rendered unclean, it was immersed in the courtyard and brought back into the Temple right away; it wasn’t necessary to wait until nightfall. If it was rendered unclean by something that is inherently unclean, it was immersed outside of the courtyard and spread out in the cheil (a fortification that surrounded the courtyard) because it must wait for nightfall to be purified. If it was new, it was spread over the portico so that people could see the beauty of its embroidery.