Check Before If Chart Object Exist

I wrote a macro that selects 3 charts existing in a sheet and sets the axes to auto scale option. The charts are labeled Chart 2, Chart 6 and Chart 7 by default, the macro selects each of then and then sets the auto scale option.

Is it possible to use 'If then' statement to check if the chart object exists ? In case they do exist then macro works on them but if not then it goes to the next statement.

Or is there any other way to check if objects exists or not, because sometimes the macro is used for old files (template) and the chart objects there have different numbers and not 2, 6 and 7. So to use macro for both templates( new and old) its better to check first. This way the macro becomes more flexible.