This document appears to be a map or listing of space invader figures located around Rome, Italy. It includes 75 numbered locations labeled "ROM_" along with additional clones and references. The space invaders were compiled in June 2016, having been invaded and installed around Rome in 2010.

1. Invaded in 2010
Compiled in June 2016

3. 19
18
17
6
24
36 16
20 37
38
49
50
10
7
52
51
53
23
11
2
26
12
13
1
41514
6356
66
62
65
39
3
33
3228
5
29
8
64
42
57
25
30
31
35
43 34
22
54
9
21
60 61
41
4055
5958
48
44
45
46
27
x1
67?
x3
x4

7. ROM_01

8. ROM_02

9. ROM_03

10. ROM_04

11. ROM_05

12. ROM_06

13. ROM_07

14. ROM_08

15. ROM_09

16. ROM_10

17. ROM_11

18. ROM_12

19. ROM_13

20. ROM_14

21. ROM_15

22. ROM_16

23. ROM_17

24. ROM_18

25. ROM_19

26. ROM_20

27. ROM_21

28. ROM_22

29. ROM_23

30. ROM_24

31. ROM_25

32. ROM_26

33. ROM_27

34. ROM_28

35. ROM_29

36. ROM_30

37. ROM_31

38. ROM_32

39. ROM_33

40. ROM_34

41. ROM_35

42. ROM_36

43. ROM_37

44. ROM_38

45. ROM_39

46. ROM_40

47. ROM_41

48. ROM_42

49. ROM_43

50. ROM_44

51. ROM_45

52. ROM_46

53. ROM_47

54. ROM_48

55. ROM_49

56. ROM_50

57. ROM_51

58. ROM_52

59. ROM_53

60. ROM_54

61. ROM_55

62. ROM_56

63. ROM_57

64. ROM_58

65. ROM_59

66. ROM_60

67. ROM_61

68. ROM_62

69. ROM_63

70. ROM_64

71. ROM_65

72. ROM_66

73. ROM_67

74. ROM_68/69?

75. ROM_68/69?

76. ROM_70 (ESRIN)
http://space-invaders.com/post/esrin/

77. ROM_71 (ESRIN)

78. ROM_72 (ESRIN)
https://www.pinterest.com/pin/503347695835341311/

79. ROM_73 (ESRIN)

80. ROM_74 (ESRIN)

81. ROM_75 (ESRIN)

82. ROM_clone1

83. ROM_clone2

84. ROM_clone3

85. References
https://www.flickr.com/photos/52690317@N06/
https://www.flickr.com/groups/spaceinvadersroma/
http://www.spakka.info/spakka/space-invader-a-roma/
https://www.youtube.com/watch?v=FNPAuhahBb4
http://rerumromanarum.blogspot.ch/2014/05/space-invaders-roma.html
http://rinaz.net/2011/07/space-invaders/