|**Living Monolith Chronology**|||||

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|Marvel Age Introductions by On-Sale Date|||||
|1969|JAN 9|XMN054A|The X-Men|[XMROS•Angel • Beast • Cyclops • Iceman • Marvel Girl] [Living Monolith]|
|1969|FEB 11|XMN055A|The X-Men|[XMROS•Professor X • Angel • Beast • Cyclops • Iceman • Marvel Girl] [Living Monolith]|
|1969|MAR 11|XMN056A|The X-Men|[XMROS•Professor X • Angel • Beast • Cyclops • Iceman • Marvel Girl] [Living Monolith]|
|1969|APR 10|XMN057A|The X-Men|[XMROS•Angel • Beast • Cyclops • Iceman • Marvel Girl] [Polaris][Havok] [Larry Trask][Living Monolith]|
|1969|MAY 13|XMN058|The X-Men|[XMROS•Angel • Beast • Cyclops • Iceman • Marvel Girl] [Polaris][Havok][Banshee][Living Monolith]|
|1969|JUN 17|XMN059|The X-Men|[XMROS•Angel • Beast • Cyclops • Iceman • Marvel Girl] [Polaris][Havok][Banshee][Quicksilver • Scarlet Witch ][Living Monolith]|
|1969|JUL 15|XMN060|The X-Men|[XMROS•Angel • Beast • Cyclops • Iceman • Marvel Girl • Polaris] [Havok][Banshee][Quicksilver • Scarlet Witch ][Sauron][Living Monolith]|