Besides their traditional arms, the Swiss Guard also has contemporary non-ceremonial small arms, like SIG P225 pistols, Heckler & Koch MP5A3 submachine guns and SIG SG 550 assault rifles at its disposal for security duties.[7] Besides the Heckler & Koch MP5A3, these small arms are also in use by the Swiss military. The Guard also engages in yearly rifle competition and receives self-defense instruction, as well as basic instruction on defensive bodyguard tactics similar to those used in the protection of many heads of state.

Originally posted by Swordbeast
Vatican is guarded and protected by the Swiss Guard

Don't be fooled by their ceremonial uniform... in order to do their Job, they are very well armed:

Besides their traditional arms, the Swiss Guard also has contemporary non-ceremonial small arms, like SIG P225 pistols, Heckler & Koch MP5A3 submachine guns and SIG SG 550 assault rifles at its disposal for security duties.[7] Besides the Heckler & Koch MP5A3, these small arms are also in use by the Swiss military. The Guard also engages in yearly rifle competition and receives self-defense instruction, as well as basic instruction on defensive bodyguard tactics similar to those used in the protection of many heads of state.

So, yes, the Vatican IS guarded 24/7

The only known content from it are a few quotations by Epiphanius (Panarion, 26), a church father who criticised how the Borborites used it to justify free love, by practicing coitus interruptus and eating semen as a religious act. While certain libertine Gnostics held that, since the flesh is intrinsically evil, one should simply acknowledge it by freely engaging in sexual acts, the majority of the Gnostics took the opposite view of extreme asceticism.