Temple Bar is the only gateway to remain in London. In addition to being the entrance to the city of Lodon, it also provides access to Temple, a place where many legal office are located. It has lots of history, and it has had its presence in many ceremonies/processions. (Queen Elizabeth met the mayor on London here following the defeat of the Spanish Armada). The presence of this bar reaches as early as the 1200s. Dickens refers to Temple Bar in the final paragraph of the excerpt from "Bleak House" as he also mentions the Lord High Chancellor. "Bleak House" is the telling of a case regarding heritance, so naturally the Lord High Chancellor would be mentioned, and as noted earlier, Temple Bar also gives access to many legal offices.
"The raw afternoon is rawest, and the dense fog is densest, and the muddy streets are muddiest near that leaden-headed old obstruction, appropriate ornament for the threshold of a leaden-headed old corporation, Temple Bar. And hard by Temple Bar, in Lincoln's Inn Hall, at the very heart of the fog, sits the Lord High Chancellor in his High Court of Chancery" (Dickens).