(sacred vessels). The scroll itself will often be girded with a strip of silk (see wimpel) and "robed" with a piece of protective fine fabric, called the "Mantle of the Law". It is decorated with an ornamental priestly breastplate, scroll-handles (‘etz ḥayyim), and the principal ornament—the "Crown of the Law", which is made to fit over the upper ends of the rollers when the scroll is closed. Some scrolls have two crowns, one for each upper end. The metalwork is often made of beaten silver, sometimes gilded. The scroll-handles, breastplate and crown often have little bells attached to them. The housing has two rollers, each of which has two handles used for scrolling the text, four handles in all. Between the handles and the rollers are round plates or disks which are carved with images of holy places, engraved with dedications to the donor's parents or other loved ones, and decorated with gold or silver. Mizrachi and Romaniote traditions In the Mizrachi and Romaniote traditions, the Torah scroll is generally not robed in a mantle, but rather housed in an ornamental wooden case which protects the scroll, called a "tik", plural tikim. On the other hand, most Sephardic communities — those communities associated with the Spanish diaspora, such as Moroccan Jews, the Spanish and Portuguese Jews (with the exception of the Hamburg tradition), and the Judaeo-Spanish communities of the Ottoman Empire — do not use tikim, but rather vestidos (mantles). Inauguration The installation of a new Torah scroll into a synagogue, or into the sanctuary or study hall (beth midrash) of a religious school (yeshiva), rabbinical college, university campus, nursing home, military base, or other institution, is done in a ceremony known as hachnosas sefer Torah, or "ushering in a Torah scroll"; this is accompanied by celebratory dancing, singing, and a festive meal. Biblical roots This practice has its source in the escorting of the Ark of the Covenant to Jerusalem, led by King David. As described in the Books of Samuel, this event was marked by dancing and the playing of musical instruments (). Both the priests or kohanim and David himself "danced before the Ark" or "danced before the Lord". Handling the scroll Special prayers are recited when the Torah scroll is removed from the ark and the text is chanted, rather than spoken, in a special melodic manner (see Cantillation and Nigun). Whenever the scroll is opened